Does cold air exert more pressure?

Answer 1

It depends on the situation. In a contained vessel (eg a tyre), then hot air would exert a higher pressure.

In general outside the pressure is (fairly) constant, and it is the density which changes with temperature. Imagine if this weren't true; you could have two pockets of air next to each other at different temperatures, and thus also at different pressures. In reality this leads to the pressure region expanding (and so decreasing in pressure), squashing the lower pressure region (increasing its pressure). This would continue until the pressures were the same in both regions.

Answer 2

Assuming that air behaves like an ideal gas, the equation PV=nRT (ideal gas law) shows that pressure (P) is directly related to temperature (T) if the volume and amount of gas is held constant. Therefore, a decrease in temperature will cause a decrease in air pressure if volume and amount of air is constant.

Answer 3

• the lower the air pressure the colder it is
• the hotter the higher the air pressure the Collier

that is how tempeture is made by globle warming and air pressure

from a kid