NEETChemistryThermodynamics (C)
Match List-I with List-II for the thermodynamic processes of an ideal gas. (A) Adiabatic free expansion (I) q = 0, w (B) Reversible adiabatic expansion (II) q > 0, w = 0, U > 0 (C) Reversible isothermal expansion (III) q = 0, w = 0, U = 0 (D) Isochoric heating (IV) q > 0, w Choose the correct answer from the options given below:
Options
- A(A)-(I), (B)-(III), (C)-(IV), (D)-(II)
- B(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
- C(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
- D(A)-(I), (B)-(III), (C)-(II), (D)-(IV)
Correct answer
C. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
Step-by-step solution
(A) Adiabatic free expansion: Heat exchange is zero ( q = 0 ). Expansion against zero external pressure means work done is zero ( w = 0 ). By the first law of thermodynamics, U = q + w = 0 . (B) Reversible adiabatic expansion: Heat exchange is zero ( q = 0 ). During expansion, work is done by the gas ( w (C) Reversible isothermal expansion: Temperature is constant, so for an ideal gas U = 0 . Work is done by the gas ( w 0 . (D) Isochoric heating: Volume is constant, so work done is zero ( w = 0 ). Heat is absorbed