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AP EAMCET202120 Aug 2021Evening ShiftChemistryThermodynamics (C)Actual

When an ideal gas expands isothermally from 5 m 3 to 10 m 3 at 25 ° C against a constant pressure of 10 7 N · m - 2 , then the work done on the gas is

Options

  1. A- 100 MJ
  2. B- 50 MJ
  3. C- 0 . 5 MJ
  4. D- 10 5 MJ

Correct answer

B. - 50 MJ

Step-by-step solution

The pressure P = 10 7   N · m - 2 Initial volume V i = 5   m 3 Final volume V f = 10   m 3 Change in volume ∆ V = V f - V i = 10   m 3 - 5   m 3 = 5   m 3 Work done of an ideal gas expands isothermally:- W = - P ∆ V W = - 10 7 × 5 = - 50 × 10 6   J = - 50   MJ Hence, the work done on the gas is - 50 MJ .

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