The diagram below shows a way of indicating the positions and direction of movement of some molecules in a has at one instant.

a. i. Describe the movement of the molecules.

ii. Explain how the molecules exert a pressure on the container walls.

b. When the gas in the cylinder is heated, it pushes the piston further out of the cylinder. State what happens to

i. The average spacing of the molecules,

ii. The average speed of the molecules.

c. The gas shown in the diagram above is changed into a liquid and then into a solid by cooling. Compare the gaseous and solid states in terms of

i. The movement of the molecules,

ii. The average separation of the molecules.

Transcribed Image Text:

cylinder piston