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5.14. Determine A Gº and ArxnG for the following reaction at 25°C, using data in Appendix 2. The partial pressures of the pro
Appendix 2 Thermodynamic Properties of various Substa A,H (at 298 K, in kj/mol) -417.98 --331.64 AG (at 298 K in kj/mol) -37


AG = A G + RT In Q. (Gibbs energy under nonstandard conditions) Ann Gº = -RT In K (relationship between ArxnGº and equilibriu
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Answer #1

DG0 = (2*DG0f,co2)-(2*DG0f,CO + 1*DG0f,O2)

    = (2*-394.4)-(2*-137.2+1*0)

    = -514.4 Kj

DG = DG0 + RTln   Q

R = ideal gas constant = 8.314 j.k-1.mol-1

T = 298 k

Q = pCO2^2/pCO^2*pO2

= 0.025^2/(0.65^2*34)  

DG = -514.4*10^3 +8.314*298ln(0.025^2/(0.65^2*34))

   = -539.3 Kj

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