Question

Mathematical formulation of the first law contains the idea of:

• A. The existence of an internal energy function
• B. The principle of the conservation of energy
• C. The definition of heat as energy in transit by virtue of a temperature difference
• D. All of the three

Hint:

The first law of thermodynamics is essentially an energy conservation statement applied to thermodynamic systems.

Answer 1

The Correct Option is D

The first law of thermodynamics states:
\[ \Delta U = Q - W \] This equation implies:
- The existence of an internal energy function \( U \).
- The principle of conservation of energy, since heat added and work done must be accounted for.
- Heat is defined as energy transferred due to a temperature difference.