Physics · Oct / Nov 2017 · Paper 12 · Question 13

A dish of liquid is left on a laboratory bench. Some of the liquid evaporates. What happens and why?

1. AThe liquid cools because liquid molecules have more potential energy than gas molecules.
2. BThe liquid cools because faster-moving molecules escape.
3. CThe liquid warms because liquid molecules have less potential energy than gas molecules.
4. DThe liquid warms because slower-moving molecules are left behind.

As printed in the paper