Hydrogen and oxygen molecules in a sample of gas have the same temperature. This means the hydrogen molecules, on average, have the same
A)speed and the same kinetic energy.
B)speed, but more kinetic energy.
C)speed, but less kinetic energy.
D)kinetic energy, but more speed.
E)kinetic energy, but less speed.

Question

Quizplus · Accepted Answer

At the same temperature, all gases have the same average kinetic energy. However, because kinetic energy is also a function of mass, lighter molecules (like hydrogen) will have higher speeds than heavier molecules (like oxygen) to maintain the same kinetic energy.

Hydrogen and Oxygen Molecules in a Sample of Gas Have