Concept:At constant temperature, compressing a gas means reducing its volume, which affects how often molecules hit the container walls.
Explanation:When gas molecules are compressed, the same number of molecules occupy a smaller volume.
The molecules move with the same average kinetic energy because temperature is constant.
However, the distance between the walls decreases, so each molecule strikes the walls more frequently.
More impacts per second on the walls mean a greater force is exerted per unit area.
Therefore, the pressure of the gas increases.
This relationship is described by Boyle's law:
P∝V1 at constant
T.
Answer:C. The molecules make more impact per second on the walls of the container.