What is the state of refrigerant in the discharge line of a system?

The refrigerant in the discharge line of a system is in a state of high pressure and high temperature vapor. This is due to the fact that in a refrigeration cycle, the compressor draws in low pressure vapor from the evaporator and compresses it, raising both its pressure and temperature significantly.

Once the refrigerant exits the compressor, it flows into the discharge line where it is still in gaseous form but at a high energy level, characterized by both high pressure and high temperature. This state is crucial for the subsequent heat rejection process that occurs in the condenser, where the refrigerant will release heat and transition from vapor to liquid.

The other choices do not accurately describe the state of refrigerant in the discharge line at this point in the cycle. Low pressure or low temperature states are not applicable post-compression, and medium pressure vapor does not correctly represent the conditions that exist in the discharge line immediately following compression.