Answer to Question #338548 in General Chemistry for Meg

Question

Consider the reaction below at 25° C for which ΔS = 16.1 J/K. Show your work.

CH4 (g) + N2(g) + 163.8 kJ ==> HCN(g) + NH3(g)

At what temperature will this reaction be spontaneous?

Answer 1

For a reaction to be spontaneous, ΔG have to be negative:

ΔH−T⋅ΔS < 0

T > ∆H/∆S = 163800 J / 16.1 J/K = 10174 K