Final answer:
The heat required to evaporate one pound of a refrigerant is known as the heat of vaporization. This concept plays a crucial role in the fields of thermodynamics and refrigeration system design. Conversions into kilowatt-hours are also made for practical applications such as energy usage calculations.
Step-by-step explanation:
The amount of heat required to evaporate one pound of a given refrigerant is called the heat of vaporization (AHvap). This thermal property describes the energy needed to transition the refrigerant from its liquid phase to its gaseous phase without changing its temperature. The heat of vaporization is an important concept in thermodynamics and various engineering applications, including the design of refrigeration systems.
In practical scenarios, for example when using liquid nitrogen as a cooling agent in dairy trucks, the calculation of heat transfer to evaporate a specific amount of liquid nitrogen is essential. Additionally, to determine the economic feasibility, it is useful to convert the energy measure into kilowatt-hours, which is a standard unit for billing electrical energy consumption.