Question

The Zeroth Law of Thermodynamics is used to define:

• A. Entropy
• B. Enthalpy
• C. Temperature
• D. Internal energy

Hint:

The Zeroth Law allows us to define temperature by establishing that if two systems are in thermal equilibrium with a third system, they must be in thermal equilibrium with each other.

Answer 1

The Correct Option is C

The Zeroth Law of Thermodynamics states that if two systems are each in thermal equilibrium with a third system, then they are in thermal equilibrium with each other. This law forms the basis for the concept of temperature, as it allows the comparison of temperatures between systems.
- Entropy is a measure of disorder and is defined through the second law of thermodynamics, not the Zeroth Law.
- Enthalpy is related to the heat content of a system and is defined through the first law of thermodynamics.
- Temperature is the physical quantity directly defined by the Zeroth Law, as it enables the comparison of thermal states between systems.
- Internal energy refers to the energy contained within a system due to both its temperature and other factors like molecular interactions, but it is not directly defined by the Zeroth Law.
Thus, the Zeroth Law of Thermodynamics is used to define Temperature.