What is the pressure corresponding to 32°F for R-123 refrigerant?

To determine the pressure corresponding to 32°F for R-123 refrigerant, one must refer to the refrigerant's specific pressure-temperature correlation. R-123, or dichlorotrifluoroethane, has defined properties that dictate how its pressure changes as temperature changes.

At 32°F, the saturation pressure of R-123 falls in the range of approximately 20 inches of mercury (Hg) vacuum, which is where this refrigerant's boiling point corresponds with the given temperature. In practical terms, this implies that at 32°F, R-123 exists as a vapor as it is lower than its boiling point at standard atmospheric pressure.

Recognizing the significant aspect of refrigerant behavior in low-pressure systems, understanding pressure conversions and the relationship with temperature is crucial. Therefore, the correct answer is indicated by the saturation pressure readings found in refrigerant tables specific to R-123, confirming that at 32°F, the pressure is indeed about 20 inches of mercury vacuum.