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KVPY2017ChemistryThermodynamics (C)

The maximum work (in kJ mol ⁻¹ ) that can be derived from complete combustion of 1 ~mol of CO at 298 ~K and 1 ~atm is [Standard enthalpy of combustion of CO =-283.0 ~kJ ~mol ⁻¹ ; standard molar entropies at 298 ~K ; S _ O 2 =205.1 ~J ~mol ⁻¹ . S _ CO =197.7 ~J ~mol ⁻¹, ~S _ CO 2 =213.7 ~J ~mol ⁻¹ ]

Options

  1. A257
  2. B227
  3. C57
  4. D127

Correct answer

A. 257

Step-by-step solution

Co ( g )+ 1 2 O ₂( ~g ) CO ₂( ~g ) N =-283.5 S =213.7-197.7- 20501 2 =-86.5 G =-283- 298 (-86.5) 1000 =-2570 ~kJ ~W _ =- G =-(-257 ~kJ )=257 ~kJ

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