A fixed container holds oxygen and helium gases at the same temperature.Which of the following statements are correct? (There could be more than one correct choice. )
A)The oxygen molecules have the greater average kinetic energy.
B)The helium molecules have the greater average kinetic energy.
C)The oxygen molecules have the greater speed.
D)The helium molecules have the greater speed.
E)The helium molecules have the same average kinetic as the oxygen molecules.

Question

Quizplus · Accepted Answer

The average kinetic energy of gas molecules in a mixture at the same temperature is the same due to the equipartition theorem, making E correct. However, because helium atoms are lighter than oxygen molecules, they move faster at the same temperature, making D correct.

A Fixed Container Holds Oxygen and Helium Gases at the Same