Physics Thermodynamics NUMS 2022
PMDC Verified Question 42 of 54
First law of thermodynamic is based on:
A
Law of conservation of charge
B
Law of conservation of energy
C
Law of conservation of mass
D
Law of conservation of momentum
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Law of conservation of energy
1. Concept:

The First Law of Thermodynamics establishes that energy can be transformed from one form to another, but can be neither created nor destroyed.

2. Formula:

$$\Delta Q = \Delta U + \Delta W$$

3. Solution:

  • The equation states that whatever thermal energy is added to the system must exactly equal the energy stored within the molecules plus the mechanical energy expended as work.


  • This is a direct, macroscopic manifestation of the universal Principle of Conservation of Energy.


4. Why other options are incorrect:

Thermodynamics does not strictly govern particle charge, mass creation (outside nuclear physics), or mechanical momentum in this specific context.

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