What are thermodynamic properties of refrigerants?

The thermodynamic properties of refrigerants are critical for understanding how these substances behave during the refrigeration cycle. These properties include pressure, temperature, and enthalpy, which are closely related to the state changes that refrigerants undergo, such as phase transitions from liquid to vapor and vice versa.

During the refrigeration process, refrigerants absorb heat from the environment when evaporating (typically at low pressure and temperature) and release heat when condensing (at higher pressure and temperature). Being aware of these properties allows engineers and technicians to optimize the performance of refrigeration systems, ensuring they operate efficiently and effectively.

The other options address characteristics that do not align with the fundamental thermodynamic principles governing refrigerants. They either mention irrelevant properties that do not impact state changes or focus on market aspects that do not influence the physical behavior of refrigerants during the refrigeration cycle.