Chemistry High School

calculate the work associated with the expansion of a gas from 42.0 l to 79.0 l at a constant pressure of 13.0 atm.

Answers

Answer 1

The work associated with the expansion of a gas is 481 atm. L.

When a gas expands at constant pressure than for a small change in volume dv work done is dw = p dv.

The volume changes from u to v at constant pressure p, then the work done is:

dw = p (v - u)

When the work is done by the system against external pressure then dw = pdv

w = [tex]\int\limits^v_u {p} \, dv[/tex]

So by calculating we get:

dw = 13( 79 - 42)

      = 13× 37

      = 481 atm. L

Therefore we get the work done in 481 atm. L.

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Related Questions

A scientist has 4 pieces of copper. Each piece is a different shape and size (samples A 1 p through D). The student measures the volume and the mass of one sample, but measures only the volume or only the mass of the other samples. Since the scientist knows that copper is a substance, the scientist claims that she can predict what the mass will be of sample B and C. She also claims she can predict what the volume will be of sample D. Use the table below to calculate the MASS OF SAMPLE. Type ONLY THE NUMBER in the space below.
​

Answers

The value of the mass (B) will be equal to 9 grams and volume (D) will be equal to 5 cm^{3}.

What is density ?

Density is the degree of ways much “stuff” is in a given quantity of space. For example, a block of the heavier detail lead could be denser than the softer, lighter detail gold (Au). A block of Styrofoam is much less dense than a brick. It is described as mass in line with unit volume.

You can consider it, as how tightly or loosely packed a substance is, or how compact it is. Solids are commonly denser than beverages, and beverages denser than gases, however there are numerous exceptions.

Density is a bodily assets of matter, as every detail and compound has a completely unique density related to it. Density described in a qualitative way because the degree of the relative "heaviness" of gadgets with a regular volume.

Copper's Density is nearly equal to 9 and density is equal to mass/volume.

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Match each label below with the appropriate term. Note: there may be more than one correct answer.

A Lewis diagram: two atoms of upper C l connected by a single bond. Both atoms have two electrons above, below, and to the outside of the pair. Arrow a points to the bond; arrow b to the electron dots below the left atom. A second diagram shows upper O single bonded to upper H to the left and below, with two electron dots above and to the right. Arrows c point to each of the bonds.

a
nonbonding electrons
sigma bond
represents two electrons
b
nonbonding electrons
sigma bond
represents core electrons
c

nonbonding electrons

bonding electrons

sigma bond

Answers

The Matchup of each label with the appropriate term is given below:

A: Sigma bond & Represents two electrons

B: Nonbonding electrons

C: Bonding electrons & Sigma bond

What is Sigma bond?

Sigma bonds, often known as bonds, are the strongest kind of covalent chemical bonding in chemistry. They are created by atomic orbitals directly overlapping one another. Using symmetry group terminology and techniques, sigma bonding for diatomic molecules is most easily defined.

Note that an electron that is not a part of chemical bonding is known as a non-bonding electron. The electron may be restricted to one atom in a lone pair. has the electron distributed throughout the molecule in a non-bonding orbital.

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Answer:B,C

Explanation:

a solution is prepared by dissolving 15.5 g of naoh in 1.50 l of solution. what is the molarity of this solution?

Answers

The molarity of a solution that is prepared by dissolving 15.5 g of NaOH in 1.50 L of solution is

How is molarity of solution calculated?

The given values are,

volume = 1.50 L

weight of NaOH = 15.5 g

Mass NaOH= 40 g/mol

Therefore, moles of NaOH is = weight / mass

                                                 = 15.5 / 40

                                                 =  0.3875

We know,

Molarity= moles of NaOH / volume

             = 0.3875 / 1.50

             = 0.25833 M NaOH

Therefore, we get the molarity of this solution as 0.25833 M NaOH

What is molarity of a solution?

Molarity is defined as the number of moles of solute dissolved in one liter of solution. Also called molarity and represented by the letter "M". Molarity formula M = n/v where M is the molarity n is the number of moles v is the total volume of the solution in liters.

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