Question 17
Gas LawsThe pressure of a gas when cooled at constant volume will decrease because the molecules
- A.collide less frequently with the walls of the container
- B.have the same average kinetic energy
- C.break up into smaller molecules
- D.decrease in number
Show the answer and explanation
Answer: A (collide less frequently with the walls of the container)
Explanation
Cooling slows the molecules, so they hit the walls less often (and less hard), lowering the pressure.