What is the density of vapor at 39 degrees?

To find the correct density of vapor at 39 degrees, it's essential to understand that the density of a gas or vapor depends on its temperature and pressure conditions, typically following the ideal gas law. The density expresses how much volume a unit mass of the vapor occupies and is calculated in units like cubic feet per pound.

At 39 degrees Fahrenheit, reference data and tables for various refrigerants or gases will provide specific values for densities. The information sources for this data are often empirical formulas or charts derived from real gas behavior under standard atmospheric conditions.

In this scenario, the value of 0.0253 ft³/lb is accurate because it aligns with the typical behavior expected from gases at that temperature. Accurate density values are crucial for calculations in refrigeration systems, as they affect various processes, including sizing of components, refrigerant charge calculations, and efficiency estimations.

Understanding these principles indicates why this specific density value would be correct, as it adheres to the established physical laws governing gas behavior at the specified temperature.