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Free energy of reaction-temperature dependence

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Free Energy of Reaction -- Temperature Dependence

2NH3(g) + 3O2(g) + 2CH4(g) 1000°C --------> Pt - Rh 2HCN(g) + 6H2O(g)

The above reaction is used in the industrial production of hydrogen cyanide. Consider the relevant thermodynamic data from the appendices of your text. (The tabulated values ΔH°f and S° are for 25°C. For the purposes of this question assume that ΔH° and ΔS° are invariant with temperature. This is not actually true but would generally be a reasonable approximation over "small" temperature ranges.)

a) Calculate ΔH° for this equation. 

-939.8 kJ 

b) Calculate ΔS° for this equation. 

165 J/K 

c) Calculate ΔG° at 787°C, for this equation.

Reference no: EM131867127

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