🔍 Key Concepts

• Evaporator function in a refrigeration cycle • Difference between latent heat and sensible heat • Meaning of refrigerating effect in terms of heat removed per pound of refrigerant

💭 Think About

• In the evaporator, is the refrigerant mainly changing temperature or state (liquid to vapor)? • Which term is commonly used to describe the amount of heat the evaporator absorbs from the space being cooled per unit mass of refrigerant? • Look at which choices are general thermodynamic properties and which one is tied specifically to refrigeration system performance.

✅ Before You Answer

• Identify where in the cycle the refrigerant actually picks up heat from the refrigerated space. • Check which term is usually expressed in BTU per pound (Btu/lb) or kJ/kg as a measure of system capacity. • Make sure you distinguish between a property of a phase change (like boiling) and the net cooling effect in the evaporator.