Consider the reaction
2N 2 O 5 (g) 4NO 2 (g)+ O 2 (g)
at 25°C for which the following data are relevant:

-Calculate $\Delta$G° for the reaction at 25°C.

Question

Consider the reaction
2N 2 O 5 (g)  4NO 2 (g)+ O 2 (g)
at 25°C for which the following data are relevant:

-Calculate  $\Delta$G° for the reaction at 25°C.

Quizplus · Accepted Answer

ΔG° = ΔH° - TΔS°
ΔH° = ΣH°(products) - ΣH°(reactants) = [4(33.150 kJ/mol) + 1(0 kJ/mol)] - [2(11.289 kJ/mol) + 1(15.000 kJ/mol)] = -30.278 kJ/mol
ΔS° = ΣS°(products) - ΣS°(reactants) = [4(239.90 J/K mol) + 1(204.80 J/K mol)] - [2(355.32 J/K mol) + 1(355.32 J/K mol)] = -479.92 J/K mol
ΔG° = (-30.278 kJ/mol) - (298 K)(-0.47992 kJ/K mol) = -25.2 kJ/mol
Therefore, the answer is C.

Consider the Reaction 2N2O5(g) 4NO2(g)+ O2(g) at 25°C for Which

Consider the Reaction
2N₂O₅(g) 4NO₂(g)+ O₂(g)
at 25°C for Which