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JEE Main 2023 (25 Jan, Shift 2) · Thermodynamic Processes

Thermodynamic Processes question from JEE Main 2023 (25 Jan, Shift 2)

Q137JEE Main 2023 · 25 JAN · SHIFT 2Easy

Thermodynamic Processes

Match List I with List II

Choose the correct answer from the options given below:

List IList II
A.Isothermal ProcessI.Work done by the gas decreases internal energy
B.Adiabatic ProcessII.No change in internal energy
C.Isochoric ProcessIII.The heat absorbed goes partly to increase internal energy and partly to do work
D.Isobaric ProcessIV.No work is done on or by the gas
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Answer: (c)

  1. Isothermal: ΔU=0\Delta U = 0: A-II.
  2. Adiabatic: Q=0Q = 0, so W=−ΔUW = -\Delta U; work by gas lowers UU: B-I.
  3. Isochoric: ΔV=0\Delta V = 0, no work: C-IV.
  4. Isobaric: Q=ΔU+PΔVQ = \Delta U + P\Delta V, heat goes partly to each: D-III.
  5. So the answer is (c).
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