How does the pressure of a refrigerant affect its boiling point?

The relationship between the pressure of a refrigerant and its boiling point is rooted in the principles of thermodynamics. When the pressure of a refrigerant is increased, the boiling point of that refrigerant also increases. This occurs because boiling is a phase change that takes place when a substance's vapor pressure equals the surrounding pressure. By raising the pressure, you effectively require the refrigerant to reach a higher temperature to achieve the necessary vapor pressure for it to transition from liquid to gas.

This concept is essential in refrigeration systems, as it allows engineers to control the temperature and efficiency of the refrigeration cycle. For instance, in typical refrigerant applications, understanding this relationship enables proper design and operation of compressors and evaporators to optimize performance and safety. Thus, the correct choice highlights a fundamental principle that governs the behavior of refrigerants under varying pressure conditions.