What is the state of refrigerant entering the compressor of a refrigeration system?

The refrigerant entering the compressor is in a superheated vapor state, characterized by high temperature and high pressure. This phase is crucial for the efficient operation of the compressor.

When the refrigerant vapor enters the compressor, it must be in a state that ensures it does not condense within the compressor, which could cause damage. Superheating the vapor not only raises its temperature above the saturation point but also allows it to absorb more heat from the evaporator. This condition maximizes the efficiency of the refrigeration cycle.

The high temperature and pressure indicate that the refrigerant has been compressed and is ready to undergo the high-pressure phase, which will eventually move into the condenser. In a properly functioning refrigeration cycle, a superheated vapor state ensures that the refrigerant can release heat effectively when it reaches the condenser, completing the cycle efficiently.

Other choices describe different states of refrigerant that are not applicable to the compressor's requirements. For instance, a liquid phase would not be suitable for the compressor, as liquids cannot be compressed like gases. Similarly, low temperatures and low pressures indicate conditions that are not conducive to the effective operation of the compressor, highlighting why the correct answer emphasizes the need for superheated vapor in such systems.