Compressibility is a measure of the relative volume change of a solid or fluid in response to a pressure change. It is defined as a measure of the instantaneous relative volume change of a fluid or solid as a response to a pressure change. In other words, it is the measure of how much a given volume of matter decreases when placed under pressure. The compressibility of a material is determined by its bulk modulus, which is the reciprocal of compressibility. The bulk modulus is equal to the ratio of the fractional change in volume to the stress applied.
Compressibility is an important concept in thermodynamics and fluid mechanics, where it is used to describe the behavior of fluids and solids under pressure. It is also used to describe deviations of the thermodynamic properties of a real gas from those expected from an ideal gas. The compressibility factor is defined as the ratio of the pressure, temperature, and molar volume of a gas, all measured independently of one another.
In summary, compressibility is a measure of how much a given volume of matter changes when placed under pressure. It is determined by the bulk modulus of the material, which is the reciprocal of compressibility. Compressibility is an important concept in thermodynamics and fluid mechanics, and is used to describe the behavior of fluids and solids under pressure.
