Question

Given the values of ?H?rxn, ?S?rxn, and T below, determine ?Suniv. Predict whether or not the reactions will be spontaneous.

a) ?H?rxn= 90 kJ , ?Srxn= 140 J/K , T= 296 K

b) ?H?rxn= 90 kJ , ?Srxn= 140 J/K , T= 760 K

c) ?H?rxn= 90 kJ , ?Srxn=? 140 J/K , T= 296 K

d) ?H?rxn=? 90 kJ , ?Srxn= 140 J/K , T= 409 K