Given are statements for 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: (a) (C) and (D) Only (b) (A) and (B) Only (c) (D) and (A) Only (d) (B) and (C) Only

Answer: (b). Extensive variables depend on the amount of matter: internal energy, volume, mass. So (A) is true. Intensive variables do not: pressure, temperature, density. So (B) is true. (C) is false since volume is extensive; (D) is false since temperature is intensive. So the answer is (b) (A) and (B) only.

Given are statements for certain thermodynamic variables, (A)… | JEE Main 2025 (22 Jan, Shift 2)

Q6JEE Main 2025 · 22 JAN · SHIFT 2Easy

Heat, Work & First Law of Thermodynamics

Given are statements for certain thermodynamic variables,

(A) Internal energy, volume $(V)$ and mass $(M)$ are extensive variables.

(B) Pressure (P), temperature ( T) and density ( $\rho$ ) are intensive variables.

(D) Mass (M), temperature (T) and internal energy are extensive variables.

Choose the correct answer from the options given below:

Show answer and solution

Answer: (b)

Extensive variables depend on the amount of matter: internal energy, volume, mass. So (A) is true.
Intensive variables do not: pressure, temperature, density. So (B) is true.
(C) is false since volume is extensive; (D) is false since temperature is intensive.
So the answer is (b) (A) and (B) only.

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Heat, Work & First Law of Thermodynamics question from JEE Main 2025 (22 Jan, Shift 2)

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