At what temperature does the specific volume vapor measure 20.81?

To determine at what temperature the specific volume of vapor measures 20.81, one would typically consult refrigerant tables or charts that provide the specific volumes of vapor at corresponding temperatures.

In refrigeration, specific volume is defined as the volume occupied by a unit mass of a substance. For refrigerants, as temperature changes, the specific volume can vary significantly.

Based on refrigerant data, when examining the values presented for temperatures in the range of the options, we find that at -15 degrees Celsius, the specific volume of the vapor aligns closely with 20.81. This indicates that at this temperature, the vapor is in a state where it has expanded sufficiently under the provided pressure conditions, reaching that specific volume.

This temperature is critical in industrial refrigeration applications, as it allows operators to manage the vapor phase effectively and apply this knowledge to system design and troubleshooting. Understanding such properties helps in optimizing efficiency and ensuring safety in refrigeration operations.