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MHT CET202015 Oct 2020Morning ShiftChemistryThermodynamics (C)Actual

Calculate the amount of work done during isothermal expansion of a gas from a volume of 4 dm ³ to 6 dm ³ against a constant external pressure of 3 atmosphere?

Options

  1. A-30 4 ~J
  2. B-60 8 ~J
  3. C-607 8 ~J
  4. D-6 0 ~J

Correct answer

C. -607 8 ~J

Step-by-step solution

aligned V ₁=4 dm ³, & ~V ₂=6 dm ³, P _ ex =3 ~atm Now, W =&- P _ ex ( V ₂- V ₁ )=-3(6-4) =&-6 ~L . atm =-6 101.3 ~J ~W =&-607.8 ~J aligned

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