Solve the following problem: Calculate the standard free energy change for the c

Question

Solve the following problem:

Calculate the standard free energy change for the combustion of methanol at 25 deg. C. Is the reaction spontaneous or non-spontaneous?

2 CH3OH(l) + 3 O2(g) -> 2 CO2(g) + 4 H2O(g)

Use 3SF's, scientific notation (specify the sign, positive or negative, of the exponent) and unit symbols in your answers. The correct answer must be in the following format: "1.23E-4 kJ, spontaneous". Note that the given example is not the correct answer to the question, and is provided for illustration purpose only.

Explanation / Answer

2 CH3OH(l) + 3 O2(g) -> 2 CO2(g) + 4 H2O(g)

Species DGf° (kJ/mol)
CH3OH(l) =-166.3
O2(g) =0.00
CO2(g)= -394.4
H2O(l)= -237.1

DG0=[2(-394.4) + 4(-237.1)] - [2(-166.3) + 3(0)]

DG0=-1404.6 kJ

DG0=-1.40*103KJ

reaction is spontanious DG=negetive signifies exothermic reaction

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