ESCO Air Conditioning Practice Exam 2025 - Free AC Certification Practice Questions and Study Guide

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Which type of heat is removed when refrigerant changes from gas to liquid in the condenser?

Conductive heat

In the condenser of an air conditioning system, the refrigerant changes from a gas state to a liquid state. This phase change process releases heat from the refrigerant to the surroundings. The heat being removed in this phase change is known as latent heat. Latent heat is the heat energy associated with a change of state without a change in temperature. In this case, the refrigerant is transitioning from a gas to a liquid, and latent heat is being released to the surroundings, which helps in cooling the refrigerant.

Conductive heat refers to heat transfer through solids, while radiant heat refers to heat transfer through electromagnetic waves. Sensible heat refers to heat energy that causes a change in temperature. In the context of the refrigerant changing state in the condenser, it is the latent heat being removed, making choice B the correct answer.

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Latent heat

Radiant heat

Sensible heat

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