Which property does specific volume inverse correlate with?

• A. Density
• B. Temperature
• C. Molecular weight
• D. Pressure

Answer: (A)

Specific volume is defined as the volume occupied by a unit mass of a substance, typically expressed in cubic meters per kilogram (m³/kg). It is the inverse of density, which is defined as mass per unit volume (kg/m³). Since density is the reciprocal of specific volume, as specific volume increases, density decreases—demonstrating that these two properties are inversely related.

Understanding this relationship is vital in fields such as thermodynamics and fluid mechanics, where one often deals with the behavior of gases and liquids under various conditions. Recognizing that changes in specific volume indicate an opposite change in density can help in predicting how materials will behave when subjected to different pressures and temperatures. This understanding is particularly useful when analyzing the performance and efficiency of refrigeration and air conditioning systems, as well as in other applications involving fluid dynamics.

The other options—temperature, molecular weight, and pressure—are not directly related to specific volume in the same inverse manner as density. While they may influence density, they do not exhibit the clear reciprocal relationship that specific volume has with density.