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MHT CET202313 May 2023Evening ShiftChemistryThermodynamics (C)Actual

Two moles of an ideal gas expand freely and isothermally from 5 dm ^3 to 50 dm ^3 . What is the value of H ?

Options

  1. AZero kJ
  2. B20 ~kJ
  3. C100 ~kJ
  4. D150 ~kJ

Correct answer

A. Zero kJ

Step-by-step solution

A free expansion means expansion against zero opposing force. P _ ext =0 and hence, W =0 For isothermal process, U =0 . H = U + P V = U - W H =0-0=0 ~kJ

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