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JEE Main · 2024 · 01 Feb 2024 · Shift 1 · Chemical Thermodynamics

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Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following :
  1. (A)
  2. (B)
  3. (C)
  4. (D)✓ Correct

Answer: (D)

Solution

Free expansion of an ideal gas is expansion into a vacuum: the gas does no work against any external pressure, so . Under adiabatic conditions, no heat is exchanged, so . Since and , by the first law , and since internal energy of an ideal gas depends only on temperature, .

JEE Main · 2024 · 01 Feb 2024 · Shift 1 · Single correct option

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