https://phet.colorado.edu/en/simulations/gas-properties

Now click on the Reset button. With no initial pressure, added heat, or constant parameter, pump some heavy species gas particles into the container. Next, turn the heat control to "Remove." You may have to use the mouse to keep the Heat Control continuously at Remoye. 1. What happens to the speed ofthe gas particles? 2. What happens to the pressure in the container? 3. What happens to the temperature in the container