6.1 conceptual and mathematical relationships

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.

• There are no intermolecular forces between gas particles.

Which of the following correctly describes the kinetic energy, KE, of a moving particle?

• as the kinetic energy increases the temperture increases

• temperature is a measure of the average kinetic energy of particles

• temperature is directly related to the average kinetic energy of the particles

• all of the above

If the temperature of a sample of gas is tripled and the volume is tripled then what happens to the pressure?

• triples

• remains the same

• is cut into a third

• doubles

If the pressure doubles the volume will be ...., the temperature will be ..., and the number of moles of gas will ....

• cut in half, remain the same, double

• double, cut in half, double

• double, cut in half, remain the same

• cut in half, double, remain the same.

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

• remains steady.

• increases.

• decreases.

• fluctuates.

As the temperature of a sample of gas increases, the particles gain more kinetic energy. How does this relate to the pressure in a constant volume container?

• the particles collide with the walls of the container more often

• the particles collide with the walls of the container with more force

• the pressure increases

• all of the above

Pressure is caused by:

• Gas molecules colliding with walls of container

• Gas molecules reacting with each other

• Gas molecules colliding with each other

• Gravity

A sample of a gas has a volume of 852 mL at 298 K. What temperature is necessary for the gas to have a volume of 945 mL? Select the appropriate equation to solve this.

• Pt = P1 + P2 + P3 + ...
• P1V1 = P2V2
• V1/T1 = V2/T2
• P1V1/T1 = P2V2/T2

A gas fills a balloon at a temperature of 27 ^oC and 1 atm of pressure. What will the pressure of the balloon be if the gas is heated to 127 ^oC? Select the appropriate equation to solve this.

• P1V1 = P2V2
• PV = nRT
• P1/T1 = P2/T2
• V1/T1 = V2/T2

Which of the following would increase the (gas) pressure of a system?

• Increase the Temperature
• Pump in more gas
• Decrease the volume
• All of these