The molar specific heat, Cv, of a gas in which each molecule has degrees of freedom γ is [tex]C_v= (s*r)/2 J/mol*K[/tex]
The molar heat capacity of a chemical substance is the quantum of energy that must be added, in the form of heat, to one operative of the substance in order to beget an increase of one unit in its temperature.
Alternately, it's the heat capacity of a sample of the substance divided by the quantum of substance of the sample; or also the specific heat capacity of the substance times its molar mass. The SI unit of molar heat capacity is joule per kelvin per operative, JK⁻¹
The largest number of logically independent values—that is, values with the freedom to change—in the data sample is referred to as the degree of freedom. If there is a remaining requirement for the data sample, particular data sample items must be picked after the degrees of freedom quantity has been decided.
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Complete question:
Thermodynamics deals with the macroscopic properties ofmaterials. Scientists can make quantitative predictions about thesemacroscopic properties by thinking on a microscopic scale. Kinetictheory and statistical mechanics provide a way to relate molecularmodels to thermodynamics. Predicting the heat capacities of gasesat a constant volume from the number of degrees of freedom of a gasmolecule is one example of the predictive power of molecularmodels.
The molar specific heatC_vof a gas at a constant volume is thequantity of energy required to raise the temperatureTof one mole of gas by one degree while thevolume remains the same. Mathematically,
[tex]C_{\rm v}= \frac{1}{n}\,\frac{dU}{dT},[/tex]
wherenis the number of moles of gas,dUis the change in internal energy, anddTis the change in temperature.
Kinetic theory tells us that the temperature of a gas isdirectly proportional to the total kinetic energy of the moleculesin the gas. The equipartition theorem says that each degree offreedom of a molecule has an average kinetic energy equal to[tex]\frac{1}{2}k_}{\rm BT[/tex], wherek_Bis Boltzmann's constant[tex]1.38 \times 10^{-23} \rm {J/K}[/tex] . Whensummed over the entire gas, this gives[tex]\frac{1}{2}nR[/tex]T, where [tex]R=8.314\; {\rm \frac{J}{mol\cdot K}}[/tex] is the ideal gas constant, for each molecular degree offreedom.
Part A
Using the equipartition theorem, determine the molar specific heat,C_v, of a gas in which eachmolecule hassdegrees of freedom.
Express your answer in terms ofRands.
Part B
Given the molar specific heatC_vof a gas at constant volume, you candetermine the number of degrees of freedomsthat are energetically accessible.
For example, at room temperature cis-2-butene,\rm C_4 H_8, has molar specific heat [tex]C_v=70.6\;{\rm \frac{J}{mol \cdot K}[/tex]}. How many degrees of freedom of cis-2-butene areenergetically accessible?
Express your answer numerically to the nearest integer.
Determine the volume in milliliters of a rock that weighs 52.0 g and has a density of 19.4 g/ml. (6 points)
Taking into account the definition of density, the volume of a rock that weighs 52.0 g and has a density of 19.4 g/mL is 2.68 mL.
Definition of densityDensity is defined as the property of matter, whether solid, liquid or gas, that allows to measure the amount of mass in a certain volume of a substance.
The expression for its calculation is the quotient between the mass of a body and the volume it occupies:
denstiy= mass÷ volume
VolumeIn this case, you know that:
Density= 19.4 g/mLMass= 52 gVolume= ?Replacing in the definition of density:
19.4 g/mL= 52 g÷ volume
Solving:
19.4 g/mL× volume= 52 g
volume= 52 g÷ 19.4 g/mL
volume= 2.68 mL
In summary, the volume is 2.68 mL.
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It takes 505 kJ to remove one mole of electrons from the atoms at the surface of a solid metal. What is the maximum wavelength of light capable of doing this?
The maximum wavelength of light capable of removing one mole of electrons from the atoms at the surface of a solid metal is 5.08 x 10-7 m.
What is wavelength?Wavelength is a measure of the distance between two adjacent peaks of a wave, and is typically measured in meters. It is an important concept in physics and is used to describe various phenomena such as light, sound, and radio waves.
The maximum wavelength of light capable of removing one mole of electrons from the atoms at the surface of a solid metal can be calculated using the equation E = hc/λ,
where E is the energy required to remove one mole of electrons,
h is Planck’s constant (6.626 x 10-34 J·s),
c is the speed of light (3.00 x 10-8 m/s) and λ is the wavelength of light.
Substituting the given values into this equation, we get:
E = (6.626 x 10-34 J·s) (3.00 x 10-8 m/s) / λ
505 kJ = (6.626 x 10-34 J·s) (3.00 x 10-8 m/s) / λ
λ = (6.626 x 10-34 J·s) (3.00 x 10-8 m/s) / (505 x 103 J)
λ = 5.08 x 10-7 m
Therefore, the maximum wavelength of light capable of removing one mole of electrons from the atoms at the surface of a solid metal is 5.08 x 10-7 m.
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Gas pressure depends only on the number of particles in a given volume and on their average kinetic energy. The type of particle does not matter.a. trueb. false
true. This assertion is correct. According to the kinetic theory of gases, gas pressure is defined by the quantity of gas particles in a given volume and their average kinetic energy.
The pressure of a gas is proportional to the frequency and force of collisions between gas particles and the container's walls. According to the kinetic theory of gases, gas pressure is defined by the quantity of gas particles in a given volume and their average kinetic energy. The type of particle makes no difference in calculating the pressure of a gas as long as the particles are all in the gas phase and behave according to the kinetic theory assumptions. The pressure of a gas is proportional to the frequency and force of collisions between gas particles and the container's walls.
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2Hg + O2 ----> 2HgO
If you had 6 mol of oxygen and 12 mol of mercury, what would be the limiting reactant (if any)? Show your work.
According to the stoichiometry of the chemical reaction, the limiting reactant is oxygen which is important for reaction to proceed.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is important while balancing chemical equations and chemical calculations used for making solutions or dilutions.
The limiting reagent is oxygen as it is present in less amount and will limit the formation of product that is mercuric oxide.Once it is used up, the reaction will not proceed.
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What is the molarity of a solution containing 2.50 moles in 35 mL of solution?
Answer: 71.43 M.
Explanation: To calculate the molarity of a solution, we divide the number of moles of solute by the volume of the solution in liters. The volume of the solution in this case is given in milliliters, so we need to convert it to liters before we can calculate the molarity.
35 mL = 0.035 L (since 1 mL = 0.001 L)
So, the molarity of the solution can be calculated as follows:
Molarity = moles of solute / volume of solution in liters
Molarity = 2.50 moles / 0.035 L
Molarity = 71.43 M
Therefore, the molarity of the solution is 71.43 M.
A 0.5191-g sample of an unknown monoprotic acid is dissolved in water and titrated with standardized potassium hydroxide. The equivalence point in the titration is reached after the addition of 29.69 mL of 0.1453 M potassium hydroxide to the sample of the unknown acid. Calculate the molar mass of the acid.
? g/mol
The molar mass of the unknown acid is 120.4 g/mol.
How to calculate the number of moles in potassium hydroxide solution?
We can use the volume and concentration of the potassium hydroxide solution to determine the number of moles of KOH that were added to the acid sample:
moles of KOH = volume of KOH solution (L) x concentration of KOH solution (mol/L)
moles of KOH = 29.69 mL x (1 L / 1000 mL) x 0.1453 mol/L
moles of KOH = 0.004307 moles
Since the acid is monoprotic, the number of moles of KOH added is equal to the number of moles of acid present in the sample. We can use this information to calculate the molar mass of the acid:
moles of acid = moles of KOH = 0.004307 moles
molar mass of acid = mass of acid (g) / moles of acid
We know that the mass of the acid sample is 0.5191 g, so we can substitute this value into the equation:
molar mass of acid = 0.5191 g / 0.004307 mol
molar mass of acid = 120.4 g/mol
Therefore, the molar mass of the unknown acid is 120.4 g/mol.
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PLEASE HELPPP AOSAPAOPSP
What are some of the difficulties in identifying particular drugs? Why is it important for forensic scientists to be able to identify particular drugs?
some medicines contain legal ingredients like starch and sugar, and forensic scientists must be able to distinguish between the two. Because courts rely on the data forensic scientists find in their research, it is crucial for them to be able to recognise specific substances.
How do you identify forensic drugs?The ideal technique for this evaluation is Gas Chromatography/Mass Spectrometry (GC/MS), which is frequently used in forensic laboratories. The method offers a quick, semi-automated analysis of the material and often produces enough data to pinpoint the problematic substances. To ascertain whether an unlawful substance is present in the supplied material is the aim of forensic drug chemistry. Law enforcement can seek criminal charges based on the study' findings, and the court can decide on the right sentence.
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HELP PLEASE!
Based on your Retention factor values for the 5 dye standards, order the dyes from most polar to least polar.
Red #3 - 0.000
Blue #1 - 0.58
Yellow #5- 0.286
Red #40- 0.046
Blue #2- 0.095
Answer:
Red #3 is the most polar, and Blue #1 is the least polar.
Explanation:
To order the dyes from most polar to least polar, we need to look at the retention factor values. The lower the retention factor value, the more polar the molecule. So, based on the given values, the order from most polar to least polar would be:
Red #3 - 0.000
Yellow #5 - 0.286
Blue #2 - 0.095
Red #40 - 0.046
Blue #1 - 0.58
Aluminum bromide and chlorine gas react to form aluminum chloride and bromine gas.
The balanced equation is : Aluminum bromide and chlorine gas react to form aluminum chloride and bromine gas.
AlBr₃ + 3Cl ---> AlCl₃ + 3Br
The Aluminum bromide and chlorine gas will react to form the aluminum chloride and the bromine gas
AlBr₃ + Cl ---> AlCl₃ + Br
reactant product
Al 1 1
Br 3 1
Cl 1 3
The chemical equation is said to be the balanced equation if the atoms of the reactants side is equals to the atoms of the product side. Multiplying the 3 in Cl and the 3 in the Br. The equation is as follows :
AlBr₃ + 3Cl ---> AlCl₃ + 3Br
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This question is incomplete, the complete question is :
Balance the chemical equation : Aluminum bromide and chlorine gas react to form aluminum chloride and bromine gas.
Write an equation that shows the formation of a copper (ii) ion from a neutral copper atom
An equation that shows the formation of a copper (ii) ion from a neutral copper atom is Cu ⇒ Cu⁺² + 2e⁻.
What is oxidation ?Oxidation occurs when a reactant loses electrons during a reaction. Reduction occurs when a reactant accumulates electrons during a reaction. When metals react with acid, this is a common occurrence. Oxidation occurs when a reactant loses electrons during a reaction.
When an atom looses an electron to form positive ion, this process is called as an oxidation reaction.
Copper will lose 2 electron to form +2 ion. The equation for the formation of copper (II) ion from neutral copper atom follows:
Cu ⇒ Cu⁺² + 2e⁻
Thus, Cu ⇒ Cu⁺² + 2e⁻ is an equation that shows the formation of a copper (ii) ion.
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Which of the following conditions indicate an acidic solution at 25 °C? Select all that apply.
pOH = 9.66
pH = 4.25
[H+] > 1.0 x 10-7 M
[H+] > [OH-]
[OH-] > [H+]
[H+] > [OH-] of the following conditions indicate an acidic solution at 25 °C among the rest options.
Option C is correct.
What exactly is acidic solution?A solution with a pH of less than 7 is said to be acidic. A solution's acidity or basicity is measured on the pH scale, which ranges from 0 to 14. Solutions with a pH of 7 or higher are basic or alkaline, while solutions with a pH lower than 7 are acidic.
The presence of more hydrogen ions (H+) than hydroxide ions (OH-) in an acidic solution is a sign of its acidity. The degree to which an acid contributes hydrogen ions to a solution determines its strength. Acids are substances that do this.
Lemon juice, vinegar, and stomach acid are all common examples of solutions that are acidic. Acids can corrode metals and other materials and have a sour taste.
At 25°C, the following conditions indicate an acidic solution:
The condition pOH = 9.66 indicates a basic solution, and [OH-] > [H+] also indicates a basic solution.
pH = 4.25 [H+] > 1.0 x 10⁻⁷ M [H+] > [OH-]
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One method for reclaiming silver metal from silver chloride results in a 94.6% yield. Calculate the actual mass of silver that can be produced in this reaction if 100.0 g of silver chloride is converted to silver metal. 2AgCl(s) → 2Ag(s) + Cl2(g)
If 100.0 g of silver chloride is converted, the amount of silver metal that would be produced would be 94.6 g.
What is mass?Mass is described as the quantitative measure of inertia which is a fundamental property of all matter.
The reaction formula ]provided is already balanced, therefore the molar ratio of silver chloride to silver metal is 1:1.
Therefore, if 100.0 g of silver chloride is converted, we can expect to produce 100.0 g of silver metal but the yield of the reaction is only 94.6%, which means that only 94.6 g of silver metal would actually be produced.
We can calculated as follows:
100.0 g × 0.946 = 94.6 g
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If 45g of salt reacts with silver nitrate what mass of silver chloride will be produced.
If 45g of salt reacts with silver nitrate. Therefore, 110.24g is the mass of silver chloride will be produced.
What is sodium chloride?Sodium chloride, also known as salt (though sea salt contains additional chemical salts), is just an ionic substance with both the chemical symbol NaCl, signifying a 1:1 ratio of chloride and sodium ions.
One mole of sodium chloride, NaCl, creates one mole of silver chloride, AgCl, according to the balanced reaction. NaCl has a molar mass of 58.5 g and AgCl has a molar mass of 143.2 g/mol.
As a result, 58.5 g of sodium chloride yields 143.2 g of silver chloride. As a result, the mass of silver chloride generated by 45 g of sodium chloride is as follows:
AgCl mass = (143.2 g 45 g)/58.5 g
= 110.24 g
Therefore, 110.24g is the mass of silver chloride will be produced.
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Consider a gas cylinder containing 0. 250 moles of an ideal gas in a volume of 6. 00 l with a pressure of 1. 00 atm. The cylinder is surrounded by a constant temperature bath at 292. 0 k. With an external pressure of 3. 00 atm, the cylinder is compressed to 2. 00 l. Calculate the w(gas) for this compression process, in j
The work done on the gas during the compression process is 0.0418 kJ/K.
How did we get the value?The work done on the gas during a compression process can be calculated using the equation:
w = -P * (Vf - Vi)
where P is the external pressure, Vf is the final volume, and Vi is the initial volume. The negative sign indicates that work is done on the gas.
Using the given values, we have:
w = -3.00 atm * (2.00 L - 6.00 L)
The volume units need to be converted to liters:
w = -3.00 atm * (2.00 L - 6.00 L) = -3.00 atm * (-4.00 L) = 12.00 L * atm
Next, the pressure unit must be converted to pascals:
w = 12.00 L * atm * (1.00 atm) = 12.00 L * 1.01325 * 10^5 Pa = 12.16 kJ
Finally, the work done must be divided by the temperature to get the work done per kelvin:
w / T = 12.16 kJ / (292.0 K) = 0.0418 kJ/K
So the work done on the gas during the compression process is 0.0418 kJ/K.
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2 NH3 + 3 CuO g 3 Cu + N2 + 3 H2O
In the above equation how many moles of water can be made when 57 moles of NH3 are consumed?
Answer:
86 moles of H2O.
Explanation:
In the reaction 2 moles of NH3 reacts with 3 moles of CuO to produce 3 moles of Cu, 1 mole of N2 and 3 moles of H2O.
So, when 57 moles of NH3 are consumed, the amount of H2O produced will be 3 * 57 moles / 2 moles = 86 moles of H2O.
After changing the pressure of a gas sample from 760.0 torr to 0.800 atm, it occupies 4.30 L volume. What was the initial volume of the gas?
With carbon dioxide, what phase change takes place when the temperature
decreases from -40°C to -80°C at 2 atm?
Carbon Dioxide Phase Diagram
K
Pressure (atm)
20-
15-
10-
10
5-
0
Melting
point
-100
Solid
-80
OA. A liquid changes to a solid.
B. A gas changes to a solid.
OC. A solid changes to a liquid.
OD. A gas changes to a liquid.
Boiling
point
Liquid
ㅎ
Gas
-20
.0
Temperature (°C)
20
With carbon dioxide, the phase change that takes place when the temperature decreases from -40°C to -80°C at 2 atm is Option B. A gas changes to a solid.
How does this occur?When the temperature decreases from -40°C to -80°C at 2 atm, the pressure and temperature of the carbon dioxide falls within the region in the phase diagram where the substance changes from a gas to a solid. This process is called deposition or sublimation.
Therefore, the correct answer is as given above. It could then be concluded that the phase change that takes place when the temperature decreases from -40°C to -80°C at 2 atm is Option B. A gas changes to a solid.
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In a breathalyzer, ethanol is detected through a reaction with the yellow-
orange dichromate ion in which the green chromium(III) ion is produced in
the presence of acid. The following balanced chemical equation
summarizes the reaction:
3 CH3CH₂OH(aq) + 2 Cr₂O72- (aq) + 16 H (aq) → 3 CH3COOH (aq) + 4 Cr³+
(aq)+11 H2O (D)
Which of these processes occurs the fastest?
The fastest process in the reaction described in the balanced chemical equation is the production of the green chromium(III) ion in the presence of acid.
What is involved ethanol reaction?The ethanol reaction involved in a breathalyzer is a chemical reaction between ethanol (CH3CH2OH) and the yellow-orange dichromate ion (Cr2O72-). In the presence of acid, the ethanol reacts with the dichromate ion to produce green chromium(III) ion (Cr³+) and acetic acid (CH3COOH).
The reaction between ethanol and dichromate ion is used in breathalyzers to detect the presence of ethanol in a person's breath. A breathalyzer is a device used to measure the alcohol concentration in a person's breath.
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Metabolism can best be described as
Answer: The sum of all chemical reactions in the body.
Catabolism (breaking down)- releases energy ATP
Anabolism (building up)- Uses energy to synthesize what body needs.
Explanation:
The chemical formula for cesium chloride is Cs Cl.
A chemist measured the amount of cesium chloride produced during an experiment. She finds that 30.8 g of cesium chloride is produced. Calculate the number
of moles of cesium chloride produced.
Round your answer to 3 significant digits.
The number of moles of cesium chloride produced 0.183 moles.
How to calculate number of moles?The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass.
According to this question, the chemical formula for cesium chloride is CsCl. A chemist measured the amount of cesium chloride produced during an experiment. She finds that 30.8 g of cesium chloride is produced.
The molar mass of Cesium chloride is 168.36 g/mol
Moles = 30.8g ÷ 168.36g/lol
moles = 0.183 moles
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2B.1 (b) When 178J of energy is supplied as heat to 1.9 mol of gas molecules,
the temperature of the sample increases by 1.78 K. Calculate the molar heat
capacities at constant volume and constant pressure of the gas.
The molar heat capacity at constant volume of the gas is 100 J/mol·K, and the molar heat capacity at constant pressure of the gas is 108.31 J/mol·K.
What is molar heat capacity?
Molar heat capacity, also known as specific heat capacity, is the amount of heat required to raise the temperature of one mole of a substance by one degree Celsius (or Kelvin). The molar heat capacity is expressed in units of joules per mole per kelvin (J/mol·K).
The molar heat capacities at constant volume (Cv) and constant pressure (Cp) can be calculated using the following equations:
Cv = ΔQ/ΔT (at constant volume)
Cp = ΔQ/ΔT (at constant pressure)
where ΔQ is the heat absorbed by the gas and ΔT is the change in temperature.
In this case, ΔQ = 178 J and ΔT = 1.78 K.
At constant volume, the heat absorbed by the gas will cause an increase in the internal energy of the gas, so only the Cv can be calculated.
Cv = ΔQ/ΔT = 178 J / 1.78 K = 100 J/mol·K
At constant pressure, the heat absorbed by the gas will cause an increase in both the internal energy and the pressure-volume work done by the gas, so Cp can be calculated. The relationship between Cp and Cv is given by:
Cp = Cv + R
where R is the universal gas constant (8.31 J/mol·K).
Cp = Cv + R = 100 J/mol·K + 8.31 J/mol·K = 108.31 J/mol·K
Therefore, the molar heat capacity at constant volume of the gas is 100 J/mol·K, and the molar heat capacity at constant pressure of the gas is 108.31 J/mol·K.
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iupac name for this compound
The IUPAC name for the given compound is "heptanal oxime."
What is heptanal oxime?Heptanal oxime, also known as heptan-2-one oxime, is an organic compound with the chemical formula C7H15NO. It is an oxime derivative of the ketone heptan-2-one. Heptanal oxime is a colorless to pale yellow solid that is sparingly soluble in water, but soluble in many organic solvents.
Heptanal oxime is used as a chemical intermediate in the production of various compounds, such as agrochemicals, pharmaceuticals, and fragrances. It is also used as a chelating agent to form stable complexes with various metals, such as copper and iron.
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A mixture of of hydrogen and of oxygen in a closed container is sparked to initiate a reaction.
When a mixture of hydrogen and oxygen in a closed container is sparked, it can undergo a combustion reaction, also known as a flame reaction. The reaction between hydrogen and oxygen is exothermic, releasing energy in the form of heat and light.
The balanced chemical equation for the combustion of hydrogen gas (H2) in the presence of oxygen gas (O2) is:
2H2 + O2 -> 2H2O
In this reaction, two molecules of hydrogen gas react with one molecule of oxygen gas to produce two molecules of water (H2O). The release of heat and light energy is due to the formation of new bonds in the water molecules, which requires energy to break the bonds in the hydrogen and oxygen molecules. This reaction is an example of an oxidation-reduction reaction, in which hydrogen acts as the reducing agent and oxygen acts as the oxidizing agent.
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What is the wavelength, in meters, of an alpha particle with a kinetic energy of 8.0x10^-13 J?
Answer:
approximately 6.49x10^-12 meters.
Explanation:
To determine the wavelength of an alpha particle with a kinetic energy of 8.0x10^-13 J, we can use the de Broglie wavelength equation:
wavelength = h / p
where h is Planck's constant and p is the momentum of the particle.
To find the momentum of the alpha particle, we can use the equation:
p = sqrt(2mK)
where m is the mass of the alpha particle, K is its kinetic energy, and sqrt represents the square root.
The mass of an alpha particle is approximately 6.64x10^-27 kg. Substituting the given values, we get:
p = sqrt(2 x 6.64x10^-27 kg x 8.0x10^-13 J) ≈ 1.02x10^-19 kg m/s
Now we can substitute the values of h and p into the de Broglie wavelength equation to get:
wavelength = h / p = 6.626x10^-34 J s / 1.02x10^-19 kg m/s ≈ 6.49x10^-12 m
Therefore, the wavelength of an alpha particle with a kinetic energy of 8.0x10^-13 J is approximately 6.49x10^-12 meters.
See question in the picture below , will give brainliest for correct answer
Answer:
2H²+O²--> 2H²O (sry subscripts can't be written on moblie)
Explanation:
the first part of the reaction shows 4 hydrogen atoms and 2 oxygen atoms, and the second formula shows the same
How much energy, in joules per mole (J/mol), does a photon in the microwave region of the EM spectrum, contain? Assume the microwave has a frequency of 5.25 x 1010 s-1. Your answer should have 3 significant figures.
The energy, in joules per mole (J/mol), of a photon in the microwave region of the EM spectrum is 5.81 x 10-3 J/mol (3 significant figures).
What is energy?Energy is the capacity for doing work. It can take many forms, including kinetic energy (the energy of moving objects), potential energy (stored energy in an object due to its position or composition), thermal energy (heat), light, and electrical energy.
The energy carried by a single photon is equal to the product of Planck's constant (h) and the frequency (f) of the photon.
Therefore, the energy carried by a single photon in the microwave region of the EM spectrum, with a frequency of 5.25 x 1010 s-1, is:
E = h x f
= (6.63 x 10-34 J.s) x (5.25 x 1010 s-1)
= 3.48 x 10-23 J
The energy per mole of photons is then equal to:
E/mol = (3.48 x 10-23 J) / (6.02 x 1023 photons/mol)
= 5.81 x 10-3 J/mol
Therefore, the energy, in joules per mole (J/mol), of a photon in the microwave region of the EM spectrum is 5.81 x 10-3 J/mol (3 significant figures).
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58.94 g of a substance of molecular mass 182 is dissolved in 1000 g of water at 20°C. At this temperature the vapour pressure of water is 17.5 mmHg. Calculate the vapour pressure of this dilute solution.
The vapor pressure of the dilute solution is 17.38 mmHg at 20°C.
What is the vapor pressure of solutions?Vapor pressure is the amount of pressure that the vapors apply to the liquid solvent when they are in equilibrium and at a particular temperature.
The environment's temperature and the type of liquid have an impact on vapor pressure.
To calculate the vapor pressure of the solution, we use the formula below:
Psolution = X * P°water
where;
Psolution is the vapor pressure of the solution,X is the mole fraction of water in the solution, andP°water is the vapor pressure of pure water.To calculate X, we need to know the number of moles of water and the number of moles of solute in the solution. We can assume that the volume of the solution is 1000 mL (or 1 L), since the density of water is close to 1 g/mL at room temperature.
Number of moles of water, n₁, in the solution:
n = mass / molar mass
n = 1000 g / 18.015 g/mol
n = 55.49 mol
Number of moles of solute, n₂ in the solution:
n = 58.94 g / 182 g/mol
n = 0.324 mol
Mole fraction of water in the solution:
X = n₁ / (n₁ + n₂)
X = 55.49 mol / (55.49 mol + 0.324 mol)
X = 0.994
Now we can calculate the vapor pressure of the solution:
Psolution = X * P°_water
Psolution = 0.994 * 17.5 mmHg
Psolution = 17.38 mmHg
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I did some of the boxes just need to figure out what the rest are. (LeChatelier’s Principle)
According to Lechatliers principle, as the concentration of HCl is decreasing, the reaction will shift to the reactant side to increase HCl, then the Keq decreases, since product concentration is decreases.
What is Lechatliers principle ?According to Lechatliers principle, when an any disorder imbalance the equilibrium of a reaction system, the system itself balances the factors and shifts to a new equilibrium.
If the concentration of any component is increased, then the reaction shifts to the direction in which it is consumed. If the concentration is decreased, the reaction shifts to the direction in which the component is produced.
Hence, as the HCl decreases, the reaction shifts to backwards direction to produce more HCl, then, concentration of reactants HCl and Mg increases, and that products and Keq decreases.
The reaction is an exothermic reaction. Hence, as the temperature is increased, the reaction shifts to the backward direction in which heat is used. Hence, reactant concentration increases, product concentration decreases, Keq also decreases.
If the temperature is reduced, the reaction shift to the forward direction. Hence, concentration of HCl, and Mg decreases but MgCl2 increases and Keq increases.
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When isopropanol (c3h8o) burns in oxygen, carbon dioxide, water, and heat are produced.
Answer: True
Explanation:
This is the standard process for all Carbon based Combustion reactions.
The compound is burned with some quantity of Oxygen, and it reacts to form some amount of water and carbon dioxide.
The sun provides _____ to a plant, when a person eats the plant, ____ is released and then transforms into___ when the person goes for a run
Answer: no answer
Explanation:
