5. Which one of the following statements is incorrect?
(A)At constant temperature, the lighter the gas molecules, the faster the average velocity of the gas molecules.
(B) A real gas behave most ideally when the container volume is relatively large and the gas molecules are moving relativelyquickly.
(C) For a 1.0-L container of neon gas at STP, its average velocity will increase when the volume of the container is decreased to0.5 L.
(D) At constant V and T, when gas added into the container, the number of collision per unit area increases to result in a higherpressure.
(E)For a 1.0-L container of neon gas at STP, its kinetic energy will increase when its temperature is increased to 100℃.