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

The correct answer reflects that for each pound of water evaporated, an evaporative condenser rejects approximately 970 to 1057 BTUs. This range is derived from the latent heat of vaporization, which is the amount of heat necessary for water to transition from liquid to vapor without a change in temperature. The latent heat for water is around 970 BTUs per pound at 212°F.

In the context of evaporative cooling systems, this process involves removing heat from the air via evaporation of water, leading to a significant thermal energy transfer. The energy associated with the phase change contributes to the efficiency of evaporative condensers in heat rejection processes, making this range pertinent for practical applications in HVAC systems and other cooling technologies.

Other ranges provided in the options either underrepresent or overrepresent the actual latent heat associated with the evaporation of water, thereby supporting the accuracy of the identified correct answer.