Question

A pan of ice is placed over a flame.

a. Describe what happens to the MOLECULES as the water goes from ice to liquid to vapor.
b. Explain what happens to the TEMPERATURE during and between these phase changes.

Answer 1

a. The molecules start packed together very tightly in a solid. Then when it turns to water, the molecules can move around each other freely, but still contained. When water turns to vapor, the molecules are going crazy moving around. They are not contained at all and bounce of of each other freely.

b. The temperature rises. (ice turns to water at 33 degrees and water turns to vapor at 212 degrees)