Q1Basic Mechanical Engineering
Question
2 marks
PART-A
Q.1. State the Zeroth law of thermodynamics.
Answer
The Zeroth Law of Thermodynamics establishes the foundational concept of temperature measurement and thermal equilibrium between interacting systems.
The Zeroth Law of Thermodynamics formally states that if two thermodynamic systems are each in thermal equilibrium with a third, independent system, then they are absolutely in thermal equilibrium with each other. This means no net heat will flow between them if they are brought into thermal contact. This principle fundamentally forms the basis for the validity of temperature measurement and the construction of thermometers, where the thermometer itself acts as the 'third system'.