Final answer:
The mass of refrigerant remains constant, but the volume may change slightly due to thermal expansion when the temperature drops from 100°F to 80°F.
Step-by-step explanation:
If a cylinder of refrigerant with a radius of 22 is moved from a truck with a temperature of 100°F to a shop with a temperature of 80°F, the quantity of liquid refrigerant in the cylinder will not remain exactly the same. This is because the volume of liquids generally expand or contract with temperature changes, and refrigerants are no exception to this behavior. It is a physical property known as thermal expansion. If the cylinder is assumed to be sealed and the refrigerant doesn't escape, the mass of refrigerant will remain constant, but the volume may change slightly due to the temperature change from the truck to the shop.