Chemistry High School

explain why the speed of sound changes if the temperature of the medium changes

Answers

Answer 1

The speed of sound changes when the temperature of the medium changes because temperature affects the density and stiffness of the medium through which sound travels.

The speed of sound is affected by the temperature of the medium through which it travels. In general, as the temperature of a medium increases, the speed of sound also increases, and as the temperature decreases, the speed of sound decreases.

This can be explained by the fact that the temperature affects the density and stiffness of the medium.

A medium at a higher temperature has a lower density and is less stiff, while a medium at a lower temperature has a higher density and is stiffer.

As sound travels through a medium, it compresses and expands the molecules in the medium, causing waves to propagate. The speed of these waves is dependent on the stiffness and density of the medium.

So when the temperature of the medium changes, the stiffness and density of the medium change, which in turn affects the speed of sound.

Therefore, the speed of sound changes when the temperature of the medium changes because temperature affects the density and stiffness of the medium through which sound travels.

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Related Questions

true or false: essential fatty acids must be obtained from the diet.

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True. Essential fatty acids must be obtained from the diet.

Fatty acids are long-chain hydrocarbons that are essential components of lipids. They play an essential part in numerous physiological processes, including the body's development, growth, and function. Essential fatty acids are fatty acids that must be obtained from the diet because they cannot be synthesized by the body. The body uses fatty acids for energy, which it can also store in adipose tissue when necessary.

Essential fatty acids are fatty acids that are necessary for the body to function properly. These fatty acids, including omega-3 and omega-6, are termed "essential" because the body cannot produce them on its own. They should be included in one's diet to maintain healthy skin and hair, reduce inflammation, and support cardiovascular health.

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Combining sodium hydroxide and hydrochloric acid will produce water and
a. sodium chloride.
b. sodium chlorite.
c. sodium chlorate.
d. sodium hypochlorite.

Answers

Combining sodium hydroxide and hydrochloric acid will produce water and: a. sodium chloride.

What is  sodium chloride?

A neutralisation reaction occurs when hydrochloric acid (HCl) and sodium hydroxide (NaOH) are mixed. Water ( H₂O ) and sodium chloride (NaCl) are created when sodium hydroxide, a base, interacts with hydrochloric acid, an acid. The following equation can be used to model this reaction:

NaOH + HCl → H₂O + NaCl

Water and sodium chloride are the end products of the reaction between sodium hydroxide and hydrochloric acid.

Therefore the correct option is A.

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The vapor pressure of a given molecular substance is affected by changes in ___ and by the strength of the ___ forces for the substance.

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Vapor pressure is defined as the amount of pressure that is exerted by a vapor present over a liquid or solid.

It is determined by the number of gas particles that are present over the surface of the liquid or solid. When the number of gas particles increases, the vapor pressure increases.

It increases with the increase in temperature and decreases with the decrease in temperature.

The strength of the intermolecular forces for a substance is another important factor that influences the vapor pressure of the substance.

Stronger intermolecular forces result in less vapor pressure, while weaker intermolecular forces result in more vapor pressure.

For example, if we compare two different molecular substances with each other, one has strong intermolecular forces, while the other has weak intermolecular forces. The substance with stronger intermolecular forces will have a lower vapor pressure than the substance with weaker intermolecular forces.

Therefore, the vapor pressure of a given molecular substance is affected by changes in temperature and by the strength of the intermolecular forces for the substance.

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Which of the following is expected to have the largest heat of combustion? CH3 H3C 'CHa HaC "CH3

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The compound H₃C-CH₂-CH₂-CH₃ is expected to have the largest heat of combustion.

The heat of combustion, ΔHc, of an organic compound is defined as the amount of heat produced when one mole of a substance is burned completely in excess air or oxygen. The heat of combustion of an organic compound is usually expressed in kJ/mol. The combustion of alkanes is an exothermic reaction that produces heat.

The heat of combustion increases as the size of the molecule increases because more bonds must be broken to combust larger molecules, resulting in a greater release of heat. Since the compound H₃C-CH₂-CH₂-CH₃ has a larger molecular mass and more carbon atoms than the other three compounds, it is expected to have the largest heat of combustion compared to the other three compounds CH₃, H₃C-CH₂-CH₃, and CH₃-CH₂-CH₃.

Thus, the compound H₃C-CH₂-CH₂-CH₃ is expected to have the largest heat of combustion.

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the average kinetic energy of the particles in a gas

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The average kinetic energy of the particles in a gas is proportional to the temperature of the substance. The option that correctly identifies the average kinetic energy of the particles in a gas is C.

In thermodynamics, the kinetic theory of gases is an essential concept. It's a branch of the study of heat and temperature in physics that deals with the movement of gas molecules. The average kinetic energy of the particles in a gas is determined by the substance's temperature. The kinetic energy of an object is proportional to its temperature.

When the temperature of a substance rises, the kinetic energy of the molecules increases, and when it decreases, the kinetic energy of the molecules decreases. The pressure, temperature, and volume of a gas are all related through the kinetic theory of gases. The kinetic theory of gases is the fundamental idea behind the ideal gas law, which is a relationship between the pressure, temperature, and volume of a gas.

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Complete question is:

The average kinetic energy of the particles in a gas

A. is not affected by the temperature of the substance.

B. increases as the temperature of the substance decreases.

C. is proportional to the temperature of the substance.

D. is equal to the total thermal energy absorbed by the substance.

A system at equilibrium contains I2(g) at a pressure of 0.16 atm and I(g) at a pressure of 0.20 atm. The system is then compressed to half its volume. a)Find the pressure of I2 when the system returns to equilibrium. b)Find the pressure of I when the system returns to equilibrium.

Answers

The pressure of I₂  when the system returns to equilibrium after compression is approximately 0.39 atm and  the pressure of I when the system returns to equilibrium after compression is 0.78 atm.

Chemical equilibrium refers to the state of a system in which the concentration of the reactant and the concentration of the products do not change with time, and the system does not display any further change in properties.

It is the state of a reversible reaction where the rate of the forward reaction equals the rate of the reverse reaction. While a reaction is in equilibrium the concentration of the reactants and products are constant.

The balanced equation for the reaction is:

I₂(g) ⇌ 2I(g)

Kp = (P(I)²) / P(I₂)

Initially, P(I₂) = 0.16 atm and P(I) = 0.20 atm.

After compression, the volume is halved, so the pressure of the gases will be doubled.

Assuming the final pressure of I₂ as x atm.

The pressure of I will be 2x atm.

Kp = ((2x)²) / x = 4x² / x = 4x

4x = (0.20)² / 0.16

x = (0.25 / 4) = 0.39 atm

Pressure of I = 2 × 0.39 atm = 0.78 atm

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what is the linux command to find out which shell you are using quizlet

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The command used to determine which shell you are using in Linux is "echo $SHELL".

When executed in a terminal, this command will display the path of the currently active shell.

Here's how it works:

Open a terminal window on your Linux system.

Type the command "echo $SHELL" (without quotes) and press Enter.

The terminal will output the path of the shell you are currently using, such as "/bin/bash" for the Bash shell, "/bin/zsh" for the Zsh shell, or "/bin/sh" for the Bourne shell.

It's important to note that the command only displays the path of the shell binary, not the specific shell version or any customization you may have made to your shell environment.

Additionally, if you are running a shell within a shell (e.g., using a terminal emulator or an SSH session), the command will only display the innermost shell being used in that context.

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