What is the relative density at -28°F and 1 atm?

To determine the relative density of a substance at a given temperature and pressure, it's crucial to refer to the specific physical properties of the material, in this case, refrigerants often used in industrial applications.

At -28°F and 1 atm, the density of the refrigerant in question would be either commonly referenced in tables or derived from specific refrigerant property data. The choice reflecting 42.57 lbs./cu.ft aligns with the density values for common refrigerants at that temperature, taking into account the characteristics and behavior of gaseous substances under fixed pressure.

Relative density is calculated by comparing the density of the material to that of a reference substance, typically air, at the same conditions. Thus, identifying this value accurately is crucial for various applications in refrigeration systems, as it affects buoyancy, flow rates, and general system efficiency.

This information is vital for refrigeration operators to ensure proper handling, system design, and safety protocols, making it imperative to understand how the density figures relate to operational conditions.