2.1.8 Moles and Gas Volumes

Question 1

What is Avogadro’s law?

Answer 1

Under the same conditions of temperature and pressure, a mole of any gas would fill the same volume of space.

Question 2

What is molar gas volume?

Answer 2

The volume per mole of a gas. (dm3 mol-1)

Question 3

What are two ways in which we can measure gas volume during an experiment?

Answer 3

• Gas syringe
• A gas delivery tube leading into an upturned measuring cylinder in a water bath.

Question 4

How are gases presumed to behave in ideal way?

Answer 4

• They are in continuous motion and do not experience any intermolecular forces.
• They exert pressure when they collide with each other and the walls of containers.
• All collisions between gas molecules/container walls are elastic.
• The kinetic energy of gases increases with temperature.
• Any differences in sizes of different gas molecules can be ignored.

Question 5

What is the ideal gas equation?

Answer 5

pV = nRT