Understanding the Ideal Gas Law

What does the Ideal Gas Law (PV=nRT) help us understand about gases?

• How gases behave in the "real world"

• How to identify certain qualities of gas

• How to calculate the mass of a gas

• How gases interact with liquids

Who developed a new equation to explain how real gases behave?

• Albert Einstein

• Johannes Diderik van der Waals

• Hank Green

• Isaac Newton

What was Johannes Diderik van der Waals' first job after his primary education?

• Carpenter

• University professor

• Teacher's apprentice

• School director

What happens to the PV/nRT ratio for real gases when pressure increases?

• It always stays equal to 1.

• It decreases and then increases.

• It increases and then decreases.

• It becomes constant.

Why is the volume of a real gas adjusted in the Van der Waals equation?

• Because gas particles are very tiny.

• Because gas particles take up some space.

• Because gas particles move quickly.

• Because gas particles stick together.

What is the main reason for correcting the pressure of a real gas in the Van der Waals equation?

• Gas particles hit the container walls harder.

• Gas particles are attracted to each other.

• Gas particles are very far apart.

• Gas particles are very heavy.

When is the Van der Waals equation most helpful for figuring out gas pressure?

• When the gas is very hot and spread out.

• When the gas is very cold and squeezed together.

• When the gas particles are not moving.

• When the gas particles are very far apart.

If you compare the pressure calculated by the Ideal Gas Law and the Van der Waals equation for gas in a very small container, what do you find?

• Both equations give almost the same pressure.

• The Ideal Gas Law shows a much higher pressure.

• The Van der Waals equation shows a much higher pressure.

• Only the Ideal Gas Law can be used for small containers.