For each of the following reactions, state whether the reaction is spontaneous or nonspontaneous as written or is easily reversible (that is, is a mixture with significant amounts of reactants and products).
a. HCN(g) + 2H2(g) → CH3NH2(g);
∆Go = 92 kJ
b. 2NO(g) → N2(g) + O2(g); ∆Go = 173 kJ
c. 2NO(g) +3H2O(g) → 2NH3(g) + 5/2O2(g);
∆Go = 479 kJ
d. 2HBr(g) → H2(g) + Br2(g); ∆Go = 110 kJ
e. H2(g) + I2(s) → 2HI(g);
∆Go = 2.6 kJ