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Given below are statements about certain thermodynamic variables. (A) Internal energy, volume V and mass M are extensive variables. (B) Pressure P, temperature T and density ρ are intensive variables. (C) Volume V, temperature T and density ρ are intensive variables. (D) Mass M, temperature T and internal energy are extensive variables. Choose the correct answer from the options given below.

Asked in JEE Main 22nd Jan 2nd Shift 2025 · State Variables and the Zeroth Law

Answer: (1) (A) and (B) only

Step-by-step solution

Extensive quantities scale with the amount of matter: mass, volume, internal

energy. Intensive ones do not: pressure, temperature, density.

(A) is right and (B) is right. (C) calls volume intensive, which is wrong, and

(D) calls temperature extensive, which is wrong.

Why the other options are wrong

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