Question

Predict whether the reaction given is product favored or reactant favored by calculating delta G from the entropy and enthalpy changes for the reaction at 25 degrees C.

H2(g) + CO2(g) > H2O(g) + CO (g)
delta H = 41.17 kJ/mol delta S = 42.08 J k-1 mol-1

Answer 1

ΔG= ΔH - TΔS

YOU need to change the values to the same unit.. 42.08 J to Kj which is 42.08 x 10-3.

ΔG= (41.17) - (298K)(42.08x10-3)= 28.6 Kj/mol

because delta G is positive, it means this reaction is reactant favored.