Question

"If two systems are each in thermal equilibrium with a third system, they are also in thermal equilibrium with each other." This statement refers to :

• A. zeroth law of thermodynamics
• B. first law of thermodynamics
• C. second law of thermodynamics
• D. Carnot's law

Hint:

Remember the laws: {Zeroth} defines Temperature. {First} is about Conservation of Energy. {Second} is about Entropy (disorder).

Answer 1

The Correct Option is A

The statement describes the Zeroth Law of Thermodynamics. This law defines the concept of temperature. If system A is in thermal equilibrium with system C, and system B is also in thermal equilibrium with system C, then A and B are in thermal equilibrium with each other. This means they are at the same temperature.