GCAP Industrial Ammonia Refrigeration Training Practice Test

Question: 1 / 400

Approximately how many BTU's does it take to convert 1 pound of saturated liquid ammonia to 1 pound of saturated gas?

450 BTU's

561 BTU's

The correct answer is based on the latent heat of vaporization of ammonia, which is the amount of energy required to convert a unit mass of a substance from liquid to gas at a constant temperature. For ammonia, it typically takes about 561 BTUs to convert 1 pound of saturated liquid ammonia to saturated gas. This energy is necessary to overcome the intermolecular forces that hold the liquid ammonia molecules together, allowing them to enter the gaseous phase.

Understanding this value is crucial in refrigeration applications, as it directly relates to the efficiency of ammonia as a refrigerant and helps in designing and operating ammonia refrigeration systems. Knowing the energy required for phase changes is essential for ensuring optimal system performance and effective heat exchange.

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720 BTU's

850 BTU's

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