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MHT CET20244 May 2024Evening ShiftChemistryThermodynamics (C)Actual

One mole of a gas occupying 3 L volume is expanded against a constant external pressure of 1 bar to a volume of 15 L. Calculate work done by the system

Options

  1. A1.200 10^3 ~J
  2. B-2.43 10^3 ~J
  3. C-1.200 10^3 ~J
  4. D2.43 10^3 ~J

Correct answer

C. -1.200 10^3 ~J

Step-by-step solution

aligned V ₁ & =3 ~L =3 dm ^3 ~V ₂ & =15 ~L =15 dm ^3 ~W & =- P _ ext V & =- P _ ext ( V ₂- V ₁ ) & =-1 bar (15 dm ^3-3 dm ^3 ) & =-12 dm ^3 bar & =-12 dm ^3 bar 100 ~J dm ^3 bar & =-1.200 10^3 ~J aligned

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