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MHT CET202124 Sep 2021Evening ShiftChemistryThermodynamics (C)Actual

When certain volume of gas expands against a constant external pressure of 2.40 10^5 ~Pa at 300 ~K to 2.2 10⁻³ ~m ^3 . If the work obtained is -0.048 ~kJ . What is the initial volume of the gas?

Options

  1. A2 10⁻³ ~m ^3
  2. B4.5 10⁻² ~m ^3
  3. C1.5 10⁻³ ~m ^3
  4. D2.8 10⁻² ~m ^3

Correct answer

A. 2 10⁻³ ~m ^3

Step-by-step solution

aligned & W =- P _ ext [ V ₂- V ₁ ] & -0.048 1000 ~J =-2.4 10^5 ~Pa [2.2 10⁻³- V ₁ ] m ^3 & 48 2.8 10⁻⁵=2.2 10⁻³- V ₁ & ~V ₁=2.2 10⁻³-0.2 10⁻³ & ~V ₁=2 10⁻³ ~m ^3 aligned

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