Two identical closed vessels contain gas of equal mass. One of these vessels is in a warm room, and the other in a cold one.

Two identical closed vessels contain gas of equal mass. One of these vessels is in a warm room, and the other in a cold one. In which of these vessels is the gas pressure lower? Why?

In a warm room, the temperature affects the speed at which gas molecules move. The higher the temperature, the faster the molecules move. In a cold room, the speed of movement of molecules will be less than in a warm one, and therefore, they will hit the walls of the vessel in which they are weaker weaker. The weaker they hit the walls of the vessel, the lower the gas pressure will be.
Answer: the gas pressure will be less in the vessel, which is in a cold room, because the speed of the molecules will be lower.