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MHT CET20226 Aug 2022Evening ShiftChemistryThermodynamics (C)Actual

A gas is allowed to expand in an insulated container against a constant external pressure of 2.5 bar from 4.5 dm ^3 to 7 10⁻³ ~m ^3 . What is the change in internal energy of the gas?

Options

  1. A-625 ~J
  2. B-312.5 ~J
  3. C-112.3 ~J
  4. D-3.25 ~J

Correct answer

A. -625 ~J

Step-by-step solution

Container is insulated Q=0 We know E = Q + W aligned & =0+ [- P ( V ₂- V ₁ ) ] & =-2.5(7-4.5) & =-2.5(2.5) 100 & =-625 ~J aligned

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