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MHT CET202619 April 2026Evening ShiftChemistryThermodynamics (C)Actual

Calculate the work done for the following reaction at 27 ,^ C C ₂ H _ 4(g) + H _ 2(g) C ₂ H _ 6(g) ( R = 8.314 , JK ⁻¹ mol ⁻¹ )

Options

  1. A2494.2 J
  2. B124.71 J
  3. C3741.3 J
  4. D187.07 J

Correct answer

A. 2494.2 J

Step-by-step solution

The given reaction is C ₂ H _ 4(g) + H _ 2(g) C ₂ H _ 6(g) Change in number of moles of gaseous species, n_g = n_p - n_r n_g = 1 - (1 + 1) = -1 Work done, W = - n_g RT W = -(-1) 8.314 (27 + 273) W = 1 8.314 300 W = 2494.2 J Answer: 2494.2 J

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