Two identical rooms, $A$ and $B$, are sealed except for an open doorway between them. Room $A$ is warmer than $B$. Which room has the greater number of molecules? (Hint: How will the pressures in the two rooms compare?)
A) Room A
B) Room B
C) Both have the same number of molecules.

Question

Quizplus · Accepted Answer

Since room A is warmer, the molecules in A have higher kinetic energy, leading to higher pressure. To equalize pressure between the rooms, room B must have more molecules to compensate for its lower temperature.

Two Identical Rooms AAA And BBB , Are Sealed Except for an Open Doorway Between Them

Two Identical Rooms $A$ And $B$ , Are Sealed Except for an Open Doorway Between Them