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KCET2025ChemistryThermodynamics (C)

Given below are two statements. Statement-I : Adiabatic work done is positive when work is done on the system and internal energy of the system increases. Statement - II : No work is done during free expansion of an ideal gas. In the light of the above statements, choose the correct answer from the options given below.

Options

  1. ABoth statements - I and Statement - II are false
  2. BStatement - I is true but statement - II is false
  3. CStatement - I is false but statement - II is true
  4. DBoth statements - I and Statement - II are true.

Correct answer

D. Both statements - I and Statement - II are true.

Step-by-step solution

S-I : In adiabatic process U = W and work done on the system is positive there fore internal energy increses. S-II : When external pressure is zero, work done is zero

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