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MHT CET202411 May 2024Morning ShiftChemistryThermodynamics (C)Actual

2 moles of an ideal gas expands isothermally from 5 dm ^3 to 10 dm ^3 at a constant external pressure of 1.5 bar. Calculate work done.

Options

  1. A7.5 dm ^3 bar
  2. B-7.5 dm ^3 bar
  3. C22.5 dm ^3 bar
  4. D-22.5 dm ^3 bar

Correct answer

B. -7.5 dm ^3 bar

Step-by-step solution

aligned & V _ l =5 dm ^3, ~V ₂=10 dm ^3, P _ ext =1.5 bar & W =- P _ ext ( V ₂- V ₁ )=-1.5(10-5)=-7.5 dm ^3 bar aligned

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