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JEE Main201912 Apr 2019Morning ShiftChemistryThermodynamics (C)Actual

An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done in k J is:

Options

  1. A+ 10.0
  2. B- 2.0
  3. C- 0.9
  4. D- 9.0

Correct answer

C. - 0.9

Step-by-step solution

w - P e x t v 2 - v 1 ⇒ - 1 bar 10 L - 1 L ⇒ - 9 L   bar ∴ 1 L   bar   = 100   J ⇒ - 900   J ⇒ - 0.90   k J

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