The zeroth law of thermodynamics states that if two bodies A and B are in thermal equilibrium with a third body C, then they are in thermal equilibrium with each other. Thermal equilibrium of two...The zeroth law of thermodynamics states that if two bodies A and B are in thermal equilibrium with a third body C, then they are in thermal equilibrium with each other. Thermal equilibrium of two bodies will mean a restrictive relation between the thermodynamic coordinates of the first body and those of the second body.