Calculate AG for the following reaction at 25°C. You will have to look up the th

Question

Calculate AG for the following reaction at 25°C. You will have to look up the thermodynamic data. 2 C,H8)+7 02(8)-4C028)+6 H20o k.J Formula C2H4 CO(g) CO2(g) cO2(aq) co(aq) HCO3-(aq) H2CO3(aq) H20(0 H20(g) CO(g) CO2(g) CO2(aq) 0z(g) O3(aq) 03(g) AHt (kJlmol) AG (kJ/mol) S (JIK mol) -32.89 68.1 -137.3 394.4 -386.2 -528.1 -587. -623.2 -237.2 -228.6 -137.3 -394.4 386.2 -84.7 52.3 110.5 -393.5 412.9 -676.3 -691.1 -699.7 -285.8 -241.8 -110.5 -393.5 412.9 229.5 219.5 197.9 213.6 21.3 -53.1 94.98 187.4 69.9 1887 97.9 213.6 121.3 205.0 110 88 2376 16.3 12.09 142.2 163.4

Explanation / Answer

Given:
Gof(C2H6(g)) = -32.89 KJ/mol
Gof(O2(g)) = 0.0 KJ/mol
Gof(CO2(g)) = -394.4 KJ/mol
Gof(H2O(l)) = -237.2 KJ/mol

Balanced chemical equation is:
2 C2H6(g) + 7 O2(g) ---> 4 CO2(g) + 6 H2O(l)

?Go rxn = 4*Gof(CO2(g)) + 6*Gof(H2O(l)) - 2*Gof( C2H6(g)) - 7*Gof(O2(g))
?Go rxn = 4*(-394.4) + 6*(-237.2) - 2*(-32.89) - 7*(0.0)
?Go rxn = -2935.02 KJ
Answer: -2935.02 KJ

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