DL Unit 7 Review - Gas Laws, KMT

An expandable container holds 15 liters of a gas at a pressure of 9.2 atm and a temperature of 310 K. The volume of the container is then increased to a new volume of 35 liters while the temperature is held constant at 310 K. What is the new pressure in the container?

• 0.7 atm

• 3.94 atm

• 2.5 atm

• 4.2 atm

Which statement is one of the assumptions of the Kinetic Molecular Theory of Gases?

• Collisions between gas particles and container walls are inelastic.

• The volume of gas is mostly filled space.

• The temperature of a gas depends on the average potential energy of the gas particles.

• Gas particles have next to no attraction or repulsion forces.

Oxygen gas in a 15.0 L container exerts a pressure of 0.38 atm at 23 ℃. How many moles of oxygen are in this container?

• 4.2 moles

• 3.4 moles

• 2.3 x 10^-1 moles

• 8.7 x 10^-3 moles

The total pressure of a mixture of three gases (oxygen, nitrogen, and carbon dioxide) inside a container is 812 mmHg. The partial pressure of the oxygen is 387 mmHg, and the partial pressure of nitrogen is 120 mmHg. What is the partial pressure of carbon dioxide?

• 204 mmHg

• 305 mmHg

• 465 mmHg

• 810 mmHg

Which statement best describes what happens when two gas atoms—one large and dense, the other small and less dense—collide in a container?

• The two atoms collide and keep their own kinetic energy. This inelastic collision between the two atoms does not change the total kinetic energy.

• The larger, denser atom is able to transfer its energy to the smaller atom, so the overall kinetic energy stays the same.

• The smaller, less dense atom is able to transfer its kinetic energy to the large atom, so the overall kinetic energy increases slightly.

• None of these.

Tags

NGSS.HS-PS2-2

Three liters of an unknown gas are at an initial temperature, Ti = 293 K. With no change in pressure, the gas is heated to a final temperature, Tf = 355 K. What is the final volume of the gas, in liters?

• 8.3

• 11.0

• 3.6

• 39.5

At STP, 2.5 moles of nitrogen gas, N₂, occupy a volume of 231 liters. How many moles of nitrogen gas, N₂, occupy a volume of 179 liters at STP?

• 3.1

• 1.9

• 7.1

• .09

A soccer ball filled with air at room temperature is left outside on a cold winter day at -5℃. Which statement describes the resulting effect on the gas particles inside the ball?

• There is an increase in the kinetic energy of the gas particles.

• There is a decrease in the kinetic energy of the gas particles.

• There is no change in the kinetic energy of the gas particles.

• There is a continuous increase in the kinetic energy of the gas particles.

Tags

NGSS.HS-PS3-2

According the kinetic molecular theory, what is true about gasses?

Select 3 answers.

• they they tend to have high kinetic energy

• they they tend to have high pressure

• they they tend to have low pressure

• they tend to have low temperatures

• they they tend to have high temperatures

Tags

NGSS.HS-PS3-2

what is X₁ and X₂?

Select 2 answers

• X₁: the first amount given

  X₂: the second amount given

• X₁: the initial condition

  X₂: the final condition

• X₁: the original condition

  X₂: the new condition

• X₁: the first volume

  X₂: the second volume