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MHT CET202415 May 2024Evening ShiftChemistryThermodynamics (C)Actual

Find the constant external pressure required to expand a gas from 2.5 L to 4.5 L if amount of work done is 500 J at 298 K ?

Options

  1. A1 bar
  2. B2.0 bar
  3. C1.5 bar
  4. D2.5 bar

Correct answer

D. 2.5 bar

Step-by-step solution

aligned V ₁ & =2.5 ~L , ~V ₂=4.5 ~L , ~W & =-500 ~J =-5 dm ^3 bar ( 100 ~J =1 dm ^3 bar ) W & =- P _ ext V P _ ext & =- W V =- W ( V ₂- V ₁ ) & = - (-5 dm ^3 bar ) (4.5-2.5) dm ^3 =2.5 bar aligned

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