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MHT CET Medical202621 April 2026Evening ShiftChemistryThermodynamics (C)Actual

A gas is compressed by an average pressure of 0.50 atmosphere, so as to decrease its volume from 400 cm ^3 to 200 cm ^3 . What will be the work done in this case?

Options

  1. A10.13 J
  2. B20.13 J
  3. C30.13 J
  4. D40.13 J

Correct answer

A. 10.13 J

Step-by-step solution

The work done on the gas during compression is given by: W = -P_ ext V Given P_ ext = 0.50 atm V₁ = 400 cm ^3 = 0.4 L V₂ = 200 cm ^3 = 0.2 L Substituting the values: W = -0.50 (0.2 - 0.4) = 0.10 L atm Using the conversion factor 1 L atm = 101.3 J : W = 0.10 101.3 J = 10.13 J Answer: 10.13 J

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