Question

The kinetic theory of gases predicts that at a given temperature :

• A. all the molecules in a gas have the same average speed
• B. all the molecules in a gas have the same average energy
• C. lighter gas molecule have higher average energies than heavy gas molecules
• D. lighter gas molecules have lower average energies than heavy gas molecules

Answer 1

The correct option is B all the molecules in a gas have the same average energy

The kinetic molecular theory predicts that at a given temperature all gas molecules have the same kinetic energy and on the average, heavier molecules move slowly.