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MHT CET202121 Sep 2021Morning ShiftChemistryThermodynamics (C)Actual

What is the work done when a gas is compressed from 2.5 10⁻² ~m ^3 to 1.3 10⁻² ~m ^3 at constant external pressure of 4.05 bar?

Options

  1. A4050 ~J
  2. B4400 ~J
  3. C4200 ~J
  4. D4860 ~J

Correct answer

D. 4860 ~J

Step-by-step solution

aligned & W =- Pext [ V ₂- V ₁ ] & =-4.05 [1.3 10⁻²-2.5 10⁻² ] & =4.05 1.2 10⁻²=4.86 10⁻² bar - m ^3 & (1 bar =10^5 ~Pa , 1 ~Pa - m ^3=1 ~J ) & W =4.86 10⁻² 10^5 ~Pa - m ^2 & =4860 ~J aligned

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