(a) Write the chemical equations that correspond to G f for NH 3 (g) and for CO(g)....

(a) Write the chemical equations that correspond to ΔG°_f for NH₃(g) and for CO(g). 

(b) For which of these formation reactions will the value of ΔG°_f be more positive (less negative) than ΔH°_f ? 

(c) In general, under which condition is ΔG°_f more positive (less negative) than ΔH°_f ? 

(i) When the temperature is high,

(ii) When the reaction is reversible, 

(iii) When ΔS°_f is negative.