PHYSICS · Single correct · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
32. A gas is enclosed in a cylindrical piston. When the gas is heated from `0∘C` to `100∘C`, the piston is allowed to move to maintain a constant pressure. According to the Kinetic-Molecular Theory of Matter
(A) the molecules continue to strike the sides of the container with the same energy
(B) the number of molecules of gas must increase
(C) the size of the individual molecules has increased
(D) the average speed of the molecules has increased