Imagine that you have a syringe with a plunger that slides easily. There is air trapped inside.
The gas pressure is 1.0 atm, the gas temperature is 20°C, and the volume of the gas is 52 mL.
You place the syringe in the freezer when the gas pressure is 1.0 atm. The volume of the air
trapped in the syringe changes to 45 mL, and the pressure is still 1.0 atm. What is the
temperature of the air in the freezer? (-23°C)