Week 11 - Temp KMT Charles's Law

Which phrase describes the motion and attractive forces of gas particles?

• random straight-line motion and no attractive forces

• random straight-line motion and strong attractive forces

• random curved-line motion and no attractive forces

• random curved-line motion and strong attractive forces

The kinetic molecular theory states that all particles of a gas are

• colliding without transferring energy

• in random, constant, straight-line motion

• arranged in a regular geometric pattern

• separated by small distances relative to their size

A sample of gas is in a rigid cylinder with a movable piston. The pressure of the gas is kept constant. If the Kelvin temperature of the gas is doubled, the volume of the gas is

• halved

• doubled

• tripled

• unchanged

Which particle diagram represents one substance in the gas phase?

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Which statement describes particles of a gas, based on the kinetic molecular theory?

• Gas particles are separated by distances smaller than the size of the gas particles.

• Gas particles do not transfer energy to each other when they collide.

• Gas particles have no attractive forces between them.

• Gas particles move in predictable, circular motion.

A sample of helium gas is in a sealed, rigid container. What occurs as the temperature of the sample is increased?

• The mass of the sample decreases.

• The number of moles of gas increases.

• The volume of each atom decreases.

• The frequency of collisions between atoms increases.

Which temperature change would cause a sample of a gas to double in volume while the pressure is held constant?

• from 400. K to 200. K

• from 200. K to 400. K

• from 400.°C to 200.°C

• from 200.°C to 400.°C

A weather balloon has a volume of 52.5 liters at a temperature of 295 K. The balloon is released and rises to an altitude where the temperature is 252 K.

How does this temperature change affect the gas particle motion?

• Particles move slower.

• The molecules will speed up as the temperature decreases.

• The average kinetic energy of the particles increases.

• It increases.

Which graph represents the relationship between temperature and volume for a sample of a gas at constant pressure?

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A sample of gas is held at constant pressure. Increasing the Kelvin temperature of this gas sample causes the average kinetic energy of its molecules to

• decrease and the volume of the gas sample to decrease

• decrease and the volume of the gas sample to increase

• increase and the volume of the gas sample to decrease

• increase and the volume of the gas sample to increase