Question

The first law of thermodynamics is conservation of:

• A. Momentum
• B. Energy
• C. Pressure
• D. Velocity

Hint:

The first law of thermodynamics is crucial for understanding heat engines, refrigeration cycles, and other systems where energy is exchanged. It is simply a statement that energy is conserved in all processes.

Answer 1

The Correct Option is B

The first law of thermodynamics is essentially the law of conservation of energy. It states that energy cannot be created or destroyed, only converted from one form to another. This law is fundamental to understanding heat transfer, work, and energy transformations in thermodynamic processes.
- Option (1) "Momentum" is incorrect because the first law does not deal with momentum, but energy.
- Option (3) "Pressure" is also incorrect because pressure is a state variable, not an energy quantity.
- Option (4) "Velocity" is incorrect as velocity is related to motion and not directly to energy conservation.
Therefore, the correct answer is Option (2) Energy.