The following reaction has the following standard thermodynamic parameters:

Question

Reaction: C(g) + D(g)----> E(g)
Delta H rxn=-26.1kJ/mol and
Delta S rxn=-69.8J/(mol*K).

Calculate the temperature at which the reaction becomes nonspontaneous.

Answer 1

dG = dH- TdS
Set dG to zero and solve for T. That gives you the T for equilibrium, any move less than that moves in the non-spontaneous direction.