Gas Laws

Lord Kelvin derived the temperature at which (theoretically) all kinetic energy is removed and molecules stop moving. What temperature, in Celsius, is absolute zero?

• O°C

• -273°C

• 273°C

• 0K

Which of the following does not describe molecules in the Kinetic Molecular Theory?

• Molecules are in constant, random motion.

• There are no interactions between molecules.

• More heat means more kinetic energy.

• Collisions between molecules are elastic and lose no energy.

• Molecules take a definite shape and have no volume.

The volume of a gas at 99.0 kPa is 300. mL. If the pressure is increased to 188 kPa, what will be the new volume?

• 158 mL

• 570 mL

• 273 mL

• -132 mL

A gas at 89°C occupies a volume of 0.67 L. At what Celsius temperature will the volume increase to 1.12 L?

• 330°C

• 603°C

• 148°C

• 273°C

The pressure in an automobile tire is 1.88 atm at 25°C. What will be the pressure if the temperature increases to 37°C?

• 1.96 atm

• 2.78 atm

• 273 atm

• 1.22 atm

A sample of air in a syringe exerts a pressure of 1.02 atm at 22°C. The syringe is placed in a boiling-water bath at 100°C. The pressure is increased to 1.23 atm by pushing the plunger in, which reduces the volume to 0.224 mL. What was the initial volume?

• 0.214 mL

• 1.23 mL

• 2.11 mL

• 2.73 mL

The pressure of a sample of helium in a 1.00-L container is 0.988 atm. What is the new pressure if the sample is placed in a 2.00-L container?

• 0.494 atm

• 2.02 atm

• 1.98 atm

• 2.73 atm

The Celsius temperature of a 3.00-L sample of gas is lowered from 80°C to 30°C. What will be the resulting volume of this gas?

• 2.58 L

• 1.13 L

• 16.7 L

• 273 L

Helium gas in a 2.00-L cylinder is under 1.12 atm pressure. At 36.5°C, that same gas sample has a pressure of 2.56 atm. What was the initial temperature in degrees Celsius of the gas in the cylinder?

• -138°C

• 15.9°C

• -14.8°C

• 273°C

A balloon contains 146.0 mL of gas confined at a pressure of 1.30 atm and a temperature of 5.0°C. If the pressure doubles and the temperature decreases to 2.0°C, what will be the volume of gas in the balloon?

• 72 mL

• 273 mL

• 175 mL

• 321 mL