Physics Thermodynamics NUMS 2023
PMDC Verified Question 30 of 54
The \(1^{st}\) law of thermodynamic is the generalization of the law of conservation of:
A
Energy
B
Momentum
C
Charge
D
Mass
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Energy
1. Concept:

The First Law of Thermodynamics bridges the gap between mechanics and thermal physics by proving that heat is simply another transferable form of energy.

2. Formula:

$$\Delta U = Q - W$$

3. Solution:

  • Before this law, heat and mechanical work were thought to be completely separate entities.


  • The First Law dictates that the total energy (accounting for both heat and work) in an isolated universe remains strictly constant.


  • Thus, it is the direct thermal generalization of the universal Law of Conservation of Energy.


4. Why other options are incorrect:

Conservation of momentum applies strictly to forces and collisions. Conservation of charge applies to electromagnetism. Thermodynamics inherently deals with energy.

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