Explanation

compressibility is a physical property used to describe the tendency of a substance or fluid to reduce its volume when subjected to external forces. This property is usually related to the relationship between density, volume and pressure of matter. The compressibility is usually expressed by the compressibility factor, which is a ratio representing the change of the volume of the actual substance relative to the volume of the ideal gas. The volume changes of ideal gases under various pressures and temperatures are calculated based on the law of ideal gases, while actual gases exhibit different behaviors from ideal gases at high and low pressures. The compressibility of the actual gas is therefore used to measure this different behavior.

Classification