Kinetic Molecular Theory

Which of the following is an assumption of the kinetic-molecular theory of gases?

• Collisions between gas particles are inelastic.

• Gases consist of closely spaced particles.

• Gas particles move around in an orderly manner.

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

Rates of effusion of different gases are proportional to their...

• polarity.

• particle charge.

• particle velocities.

• compressibility.

If a gas has the same temperature throughout, which gas molecule has the highest average velocity?

• O₂

• H₂O

• H₂

• Xe

Gas pressure is caused by

• gas molecules colliding with surfaces
• gas molecules condensing to a liquid
• gas molecules hitting other gas molecule
• barometers

• Gases do not move in straight line
• Most of the volume of gas is empty space
• Gas particles are not in constant random motion
• Gas particles attract each other

• Gas particles are elastic and do not attract each other.
• The kinetic energy of gas is dependent on temperature 
• Energy is not lost when gas particles collide with each other or with the walls of the container.
• All of the above

For a fixed amount of gas at a constant temperature, the volume increases as the pressure...

• remains steady.

• increases.

• decreases.

• fluctuates.