A scientist created diagram X to represent the molecules of a kind of gas in a closed container. Diagram Y represents the molecules in the container after the size of the container was reduced. The temperature in the container was not changed.

Question

What most likely happened to the system when the scientist changed the size of the container?
A.
Matter was removed.
B.
The pressure decreased.
C.
The pressure increased.
D.
Matter was added.

Answer 1

When the size of the container is reduced while keeping the temperature constant, the molecules of the gas have less space to move around, which leads to more frequent collisions with the walls of the container. This results in an increase in pressure.

Therefore, the correct answer is:

C. The pressure increased.