For an Ideal gas(steam), the compressibility factor is obviously unity under all conditions whereas for real gas(steam), the compressibility factor may be less or more than unity based on the actual conditions. With best regards, elavazhgan.

compressibility of petrol

The compressibility of Jetfuel is 0.88x10-9 m2/N

The compressibility of soils is a process known as consolidation. Consolidation is the geotechnical process of reducing a soils volume by reducing voids either filled with air or water. The are different forms of consolidation, however consolidation and settlement are indeed problems that a Geotechnical Engineer would address.

Compressibility is the physical process of the volume change under the action of an external pressure.