Question

A rigid container (volume cannot change) is filled with carbon dioxide gas at room temperature. The container is then placed in a sub-zero freezer with temperatures around -40 °C. The amount of gas in the container is fixed and cannot change. A pressure sensor and a thermometer are mounted inside the container to collect data.

What happens to the temperature of the gas inside the container?

Answer 1

The reduction in the temperature leads to an automatic decrease in the pressure of the gas inside the he container. This is due to the decreased number of collisions per unit area of the container walls. Pressure law states that at constant volume, the pressure of a fixed mass of a gas is directly proportional to the absolute temperature.