Theoretical temperature question

[b0son]

Originally Posted by Jack91

would it take more or less or the same amount of time to equalise to outside temperature?

Airflow depends on what, if any, pressure differential there is between inside/outside, as this governs in which direction the air will flow, and how fast.

If they start at the same temperature/pressure, and then you seal the container to run the aircon, upon opening, air would flow from 40deg (out) to 20deg (in, lower pressure), and 20deg(in, higher pressure) to 0deg (out).

BUT... for air flowing in, the rate of flow slows as the pressure rises because you are moving air into a confined space. OTOH, for air flowing out, it is effectively an open space, the air outside never rises in pressure relative to the room, so in theory should flow at a constant rate until equilibrium.