Gases

Question 6 • IA-Chemistry A Survey of Chemistry A

Which statement best describes the collisions of gas particles according to the kinetic-molecular theory?

Answer

When particles pass close enough to one another, their attractions pull them together, and then they bounce apart with no gain or loss of energy.

As particles travel in straight lines, their paths sometimes meet, and then they bounce apart with no gain or loss of energy.

When particles pass close enough to one another, their attractions pull them together, and then they bounce apart with a loss of energy.

As particles travel in straight lines, their paths sometimes meet, and then they bounce apart with a loss of energy.

Explanation

In the kinetic-molecular theory, gas particles move in straight lines until they collide. Their collisions are elastic, meaning the particles bounce apart without any net loss of kinetic energy. So the best description is that their paths sometimes meet and they bounce apart with no gain or loss of energy.

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