What are zeroth Law explain

Zeroth Law of Thermodynamics

• Zeroth law of thermodynamics states that when two systems are in thermal equilibrium through a third system separately then they are in thermal equilibrium with each other also.
  • Foreg: - Consider two systems A and B which are separated by an adiabatic wall. Heat flow happens between systems A and C, and between B and C, due to which all 3 systems attain thermal equilibrium.

• Zeroth Law of Thermodynamics suggested that there should be some physical quantity which should have same value for the system to be in thermal equilibrium.

• This physical quantity which determines whether system is in equilibrium or not is Temperature.

• Temperature is the quantity which determines whether the system is in thermal equilibrium with the neighbouring system.
• When the temperature becomes equal then the flow of heat stops.