Unit 2 Review: Energy and Particles in Motion

If the temperature of a sample of gas with a constant number of particles is lowered, which of the following is also decreased?

I. The pressure of the gas sample.

II. The average speed at which the gas particles travel.

III. The number of collisions the gas particles makes with the walls of the cylinder.

• I only.

• I and II only.

• II and III only.

• I, II, and III.

A pressure of 745 mmHg corresponds to how many atmospheres?

• 0.566

• 0.980

• 1.02

• 2.00

An open-ended manometer filled with mercury and attached to a sample of gas is shown. What is the pressure of the gas?

• 80 mmHg

• 640 mmHg

• 800 mmHg

• 880 mmHg

Your average body temperature is 37°C. What is this in Kelvin?

• –237 K

• 37 K

• 287 K

• 310 K

Standard Temperature and Pressure (STP) is:

• 1.00 atm and 273°C

• 1.00 mmHg and 0 K

• 760 atm and 0 K

• 1.00 atm and 273 K

The graph shows the relationship between which set(s) of gas properties?

I. Pressure and Volume

II. Volume and Temperature

III. Pressure and Temperature

• I only.

• I and III only.

• II and III only.

• I, II, and III.

A gas at 750 mmHg and with a volume of 2.00 L is allowed to change its volume at constant temperature until the pressure is 600.0 mmHg. What is the new volume of the gas? Use a PVnT Table to solve!

• 1.6 L

• 2.5 L

• 15 L

• 27 L

A sample of gas occupies 324 mL at 40.0°C. What volume will the gas occupy at 20.0°C if there is no change in pressure? Use a PVnT Table to solve!

• 162 mL

• 303 mL

• 346 mL

• 648 mL

What would be the pressure of a gas, originally at 759.8 mmHg, if the temperature is lowered from 95.0°C to 85.0°C at constant volume? Use a PVnT Table to solve!

• 680 mmHg

• 735 mmHg

• 739 mmHg

• 781 mmHg

The graph shows the relationship between which set(s) of gas properties?

I. Pressure and Volume

II. Volume and Temperature

III. Pressure and Temperature

• I only.

• I and III only.

• II and III only.

• I, II, and III.