Question

Calculate the ΔG for the following system. Then state if the system is spontaneous or not spontaneous. ΔH = 147 kJ ΔS = -67.0 J/K T = 149 °C 2.8 x 104 kJ; not spontaneous 157 kJ; not spontaneous 175 kJ; not spontaneous 2.8 x 104 kJ; spontaneous 157 kJ; spontaneous 175 kJ; spontaneous

Answer 1

Once criterion of knowing whether the reaction is spontaneous or not, is by looking at the sign of delta G. If it's negative, the process is spontaneous, and vv. The formula for delta G is

G = H - TS
G = 147 kJ - (-67/1000 kJ)*(149 + 273 K)
G =175 kJ

Thus, the process is non-spontaneous.