Changing the pressure on refrigerant will alter what property?

The correct choice is indeed that changing the pressure on refrigerant will alter its boiling and condensing temperature. This relationship is rooted in the principles of thermodynamics and the behavior of refrigerants in phase change processes.

When pressure increases, the boiling point of a liquid also increases. This means that for a refrigerant, if you raise the pressure, it will require a higher temperature to boil into vapor. Conversely, when the pressure decreases, the boiling point falls, allowing the refrigerant to boil at a lower temperature. This is critical in refrigeration cycles, where maintaining specific pressures ensures that refrigerants can effectively absorb heat from the environment and subsequently condense back into a liquid by releasing that heat.

Understanding this relationship is essential for correctly sizing components in a refrigeration system and for ensuring efficient operation under various load conditions. The implications of pressure on boiling and condensing temperatures are fundamental for maintaining proper thermodynamic cycles in cooling applications.