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

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 3

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 4

Which of these changes most likely results in an increase in the volume of a gas?✔ decreasing the pressure on the gascooling the gasX removing some of the gas from the sample

Revolt · Accepted Answer

✔ decreasing the pressure on the gas

Question 5

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.Decrease✔ IncreaseExpand indefinitelyThere is not enough information to tell.

Revolt · Accepted Answer

✔ Increase

Question 6

A sample of a gas is placed inside a cylinder that is a fixed size. The cylinder is heated as additional gas is added to it. What will most likely happen to the pressure of the gas inside the cylinder?It will decrease.✔ It will increase.It will not change.

Revolt · Accepted Answer

✔ It will 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.

Question 8

Question 8

Revolt · Accepted Answer

hydrogen; methane; ammonia; fluorine

Question 9

For each pair of gases, select the one that most likely has the highest rate of effusion. Use the periodic table if necessary.Oxygen (O2) or hydrogen (H2): X oxygen✔ hydrogen

Revolt · Accepted Answer

✔ hydrogen; hydrogen; methane; ammonia; fluorine

Question 10

Methane (CH4) or carbon tetrachloride (CCl4):✔ methaneX carbon tetrachloride

Revolt · Accepted Answer

✔ methane

Gases Answers

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