A system that obeys Pascal’s law is called a hydrostatic system.
Properties of Hydrostatic System:
1. The pressure is uniform throughout the system and acts normally outwards at every point on the walls.
2. Any additional pressure applied at any point gets transmitted throughout the system in such a way that the pressure everywhere continues to remain uniform.
These conditions are obeyed by,
i. Small amounts of liquids for which the effect of gravity may be neglected.
ii. Gaseous systems, however, all liquids are nearly incompressible. Any change in pressure doesn’t produce an appreciable change in volume. Due to this reason, for the thermodynamic analysis of a hydrostatic system. It is convenient to take a closed gaseous system.