NEETChemistryThermodynamics (C)
Match List I with List II. List I (Process) List II (Thermodynamic parameters) A. Isothermal reversible expansion of an ideal gas I. q = 0 , w > 0 , U > 0 B. Adiabatic compression II. w = 0 , q > 0 , U > 0 C. Heat supplied at constant volume III. q = 0 , w = 0 , U = 0 D. Free expansion of an ideal gas adiabatically IV. U = 0 , q > 0 , w Choose the correct answer from the options given below:
Options
- AA-IV, B-I, C-II, D-III
- BA-I, B-IV, C-II, D-III
- CA-IV, B-II, C-I, D-III
- DA-II, B-I, C-IV, D-III
Correct answer
A. A-IV, B-I, C-II, D-III
Step-by-step solution
According to the first law of thermodynamics, U = q + w . A. For isothermal reversible expansion of an ideal gas, temperature is constant, so U = 0 . Since it is an expansion, work is done by the system ( w 0 . (Matches IV) B. For adiabatic compression, there is no heat exchange ( q = 0 ). Compression means work is done on the system ( w > 0 ). Therefore, U = 0 + w > 0 . (Matches I) C. When heat is supplied at constant volume, the process is isochoric ( V = 0 ), so w = 0 . Heat supplied means q > 0 . Therefore, U =