For the following reactions
(a) zn(s) + cu2+(aq) → zn2+(aq) + cu(s)
(b) c12 h22 o11 (s) + 12 o2(g) → 12 co2(g) + 11 h2 o(l)
(i) calculate the standard reaction gibbs energies at 298 k.
(ii) use standard gibbs energies of formation from the data tables to calculate the standard reaction gibbs energies at 298 k. compare these values with those calculated in (i).