Gases

Question 1

Recall the postulates of kinetic-molecular theory. Read the list and check all the statements that apply to the behavior of an ideal gas:

Revolt · Accepted Answer

gas particles behave like hard spheres; gas particles travel randomly; average kinetic energy of a collection of gas particles depends on the temperature

Question 2

Which scenarios contradict ideal gas characteristics, representing deviations from kinetic-molecular principles or exceptions to ideal gas behavior? Select 3 options.

Revolt · Accepted Answer

a gas at very low volumes, when gas particles are very close together; a gas at very low temperatures, when gas particles have very little kinetic energy; a gas with highly polar molecules that have very strong intermolecular forces

Question 3

The diagrams to the right show the distribution and arrangement of gas particles in two different containers. According to kinetic-molecular theory, which of the following statements is true? Check all that apply.

Revolt · Accepted Answer

If the temperatures of both containers are equal, container A has greater pressure than container B.; If the pressure in both containers is equal, container A has a lower temperature than container B.

Question 4

A sample of gas is enclosed in a container of fixed volume. Identify which of the following statements are true. Check all that apply.

Revolt · Accepted Answer

If the container is cooled, the gas particles will lose kinetic energy and temperature will decrease.; If the gas particles move more quickly, they will collide more frequently with the walls of the container and pressure will increase.; If the gas particles move more quickly, they will collide with the walls of the container more often and with more force, and pressure will increase.

Question 5

Which of these changes most likely results in an increase in the volume of a gas?

Revolt · Accepted Answer

decreasing the pressure on the gas

Question 6

A container with a specific volume “V” changes to “2V.” What happens to the average distance between gas molecules? Assume that pressure and temperature of the gas remain constant.

Revolt · Accepted Answer

Increase

Question 7

Identify the examples of diffusion in the list below. Check all that apply.

Revolt · Accepted Answer

A teacher takes the cap off a permanent marker. A few minutes later, students at the back of the classroom complain about the odor of the marker.; A cooking school student burns a piece of toast. Soon, the entire kitchen smells like burnt toast.; Toxic fumes produced by a chemical factory are detected in the air in a town several miles away.

Gases Answers

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