Kinetic Molecular Theory and Ideal Gases Quiz

Which of the following is NOT an assumption of the kinetic molecular theory for ideal gases?

• There are no intermolecular forces.

• Molecules move in a predictable pattern.

• Collisions between molecules are elastic.

• Molecules have negligible volume.

What is the primary cause of pressure in a gas?

• Molecular collisions with container walls.

• The temperature of the gas.

• The volume of the gas.

• The weight of the gas.

Which unit is equivalent to one newton per square meter?

• Atmosphere

• Pascal

• Torr

• Bar

What does the Kelvin scale measure in relation to molecular motion?

• The average speed of molecules.

• The absolute temperature where molecular motion stops.

• The freezing point of water.

• The boiling point of water.

What constant is used in the equation to calculate average kinetic energy from temperature?

• Planck's constant

• Boltzmann's constant

• Gravitational constant

• Avogadro's number

How do you convert a temperature from Celsius to Kelvin?

• Add 100

• Add 273

• Multiply by 1.8

• Subtract 273

If the mass of an oxygen molecule is known, what additional information is needed to calculate its speed at a given temperature?

• The number of molecules

• The temperature in Kelvin

• The pressure of the gas

• The volume of the gas

At the same temperature, which type of gas molecules will move faster?

• Heavier molecules

• Lighter molecules

• Molecules with larger volume

• Molecules with higher pressure

What happens to the speed of gas molecules as the temperature increases?

• It becomes zero.

• It remains constant.

• It increases.

• It decreases.

Why do lighter molecules move faster than heavier ones at the same temperature?

• They have more kinetic energy.

• They have less kinetic energy.

• They need to move faster to have the same kinetic energy.

• They are affected by gravity differently.