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MHT CET202124 Sep 2021Morning ShiftChemistryThermodynamics (C)Actual

What is the constant external pressure of an ideal gas when expanded from 2 10⁻² ~m ^3 to 3 10⁻² ~m ^3 , if the work done by the gas is -5.09 ~kJ ?

Options

  1. A5.09 10^5 Nm ⁻²
  2. B1.01 10^5 Nm ⁻²
  3. C2.02 10^5 Nm ⁻²
  4. D5.60 10^5 Nm ⁻²

Correct answer

A. 5.09 10^5 Nm ⁻²

Step-by-step solution

aligned & W =- P _ ext [ V ₂- V ₁ ] & W =-5.09 ~kJ & =-5090 ~J & -5090=- P _ ext [3 10⁻²-2 10⁻² ] & 5090= Pext 1 10⁻² & P _ ext =509000 Nm ⁻² & =5.09 10^5 Nm ⁻² aligned

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