At 273 K, ΔG° for the reaction
2 C(s) + O2(g) → 2 CO(g)
is about -280 kJ, and at 1480 K is about -580 kJ.
For the reaction
2 Zn(s) + O2(g) → 2 ZnO(s)
ΔG° at 273 K and 1480 K, respectively, is -640 and -280 kJ. Calculate ΔG° at 273 K and 1480 K, respectively, for the reduction of zinc oxide by carbon.
◦ +180 and -150 kJ
◦ +360 and -300 kJ
◦ -360 and +300 kJ
◦ -180 and +150 kJ