Zeroth Law of Thermodynamics

The Zeroth Law of Thermodynamics is a fundamental principle that forms the basis for temperature measurement.

If an object with a higher temperature comes in contact with an object of lower temperature, it will transfer heat to the lower-temperature object. The objects will approach the same temperature and in the absence of loss to other objects, they will maintain a single constant temperature. Therefore, thermal equilibrium is attained.

The Thermodynamics Zeroth Law states that if two systems are simultaneously in thermal equilibrium with a third system, they are in equilibrium.

If objects ‘A’ and ‘C’ are in thermal equilibrium with ‘B’, then object ‘A’ is in thermal equilibrium with object ‘C’. This means all three objects are at the same temperature, forming the basis for comparing temperatures.

The Zeroth Law of Thermodynamics states that:

two system which are equal in temperature to a third system are equal in temperature to each other.