Question

Define zeroth law of thermodynamics.

Answer 1

1. The zeroth law of thermodynamics frames an idea of temperature as an indicator of thermal equilibrium.
2. When a body ‘A’ is in thermal equilibrium with another body ‘b’, and also separately in thermal equilibrium with a body ‘C’, then body ‘B’ and ‘C’ will also be in thermal equilibrium with each other. This statement defines the zeroth law of thermodynamics. The law is based on temperature measurement.