Consider the reaction 2POCl3(g) → 2PCl3(g) + O2(g)
a. Calculate ΔG° for this reaction. The ΔG°f values for POCl3(g) and PCl3(g) are -502 kJ/mol and -270 kJ/mol, respectively.
b. Is this reaction spontaneous under standard conditions at 298 K?
c. The value of ΔS° for this reaction is 179 J/K. At what temperatures is this reaction spontaneous at standard conditions? Assume that ΔH° and ΔS° do not depend on temperature.