Question

explain the changes in molecular motion of particles as they change from solid to liquid to gas. a as the phase changes occur, the freedom of motion of the particles increases. b as the phase changes occur, the freedom of motion of the particles decreases. c as the phase changes occur, the freedom of motion of the particles compresses. d as the phase changes occur, the freedom of motion of the particles is constant.

Explanation:

In solids, particles vibrate in fixed positions. In liquids, they can move more freely (slide past each other). In gases, particles move freely and rapidly. So as phase changes from solid to liquid to gas, particle motion freedom increases. Option A matches this.

Answer:

A. As the phase changes occur, the freedom of motion of the particles increases.