For each pound of water evaporated, how many BTUs does an evaporative condenser typically reject?

In an evaporative condenser, the amount of heat rejected per pound of water that evaporates is primarily related to the latent heat of vaporization of water, which is the energy required to convert water from a liquid to a vapor without changing its temperature. This value is typically around 970 to 1057 BTUs per pound of water evaporated.

The correct range of 970 to 1057 BTUs encompasses the energy transfer that occurs during the evaporation process, making it the appropriate answer. Understanding this principle is critical in industrial applications, as it informs system efficiency, energy consumption, and the design of cooling systems.

Other ranges presented do not accurately represent the heat rejection involved in this process. The figures below this correct range do not take into account the full energy required for changing water from liquid to vapor, while the higher figures exceed the typical values for this process, reflecting a misunderstanding of the thermodynamic properties of water's phase changes.