You have a box containing N hydrogen gas molecules (H) with a temperature in the

Question

You have a box containing N hydrogen gas molecules (H) with a temperature in the neighborhood of but not at room temperature, and another box containing 2N helium atoms (He) similarly near room temperature but not necessarily the same temperature as the other box. The two boxes were brought into contact and at some time later it was determined that the thermal energy per particle in each box is the same. What would it mean if the boxes are in thermal equilibrium? Explain. Are the boxes in thermal equilibrium? Explain. (15 points)

Explanation / Answer

Solution:

Two boxes are in thermal equilibrium means the temperature of two boxes become same.

But here the thermal energy per particle in boxes are same.

Which means it's not necessary to be two boxes are in thermal equilibrium.

So it means boxes are not in thermal equilibrium.

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