Discussion

Match the Thermodynamic laws in Column I with the description given in Column II

Column I		Column II
P	Zeroth law	1	Entropy of a perfect crystal at 0 K is zero
Q	First law	2	Introduces Entropy
R	Second law	3	Defines thermal equilibrium
S	Third law	4	Defines internal energy

Answer: A

The correct matching is P → 3; Q → 4; R → 2; S → 1.

Zeroth law: two systems each in thermal equilibrium with a third are in equilibrium with each other, which defines thermal equilibrium and temperature (3).
First law: energy conservation, \(\Delta U = Q - W\), which introduces internal energy as a property (4).
Second law: introduces entropy and the direction of spontaneous processes (2).
Third law: the entropy of a perfect crystal at 0 K is zero (1).

Every other option assigns entropy at 0 K or thermal equilibrium to the wrong law.

No comment is present. Be the first to comment.

Loading…