Evidence that molecules of a gas are in constant motion is:
A) winds exert pressure
B) two gases interdiffuse quickly
C) warm air rises
D) energy as heat is needed to vaporize a liquid
E) gases are easily compressed

Question

Quizplus · Accepted Answer

The phenomenon of two gases interdiffusing quickly is direct evidence of the constant motion of gas molecules, as described by the kinetic molecular theory. This theory explains that gas molecules are in constant, random motion, and this motion leads to the mixing (diffusion) of different gases when they are brought into contact.

Evidence That Molecules of a Gas Are in Constant Motion