a) Zeroth law of thermodynamics
b) Second law of thermodynamics
c) Third law of thermodynamics
d) First law of thermodynamics
Answer: d
Explanation: For closed system, a change in the energy content is the algebraic difference between the heat supply, Q, and the work done, W, during any change of state. The energy may include many types of energies including kinetic, potential, electrical etc., but from thermodynamic point of view these energies are ignored and the energy due to rise in temperature is considered.
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