Which reactions are spontaneous?i. C2H5OH(l) + 3O2(g) 2CO2(g) + 3H2O(l), G = –36.7 kJii. 2C6H6(l) + 15O2(g) 12CO2(g) + 6H2O(l), G = –6,405 kJiii. CaCO3(s) CaO(s) + CO2(g), G = 13.0 kJiv. Ni(s) + Cl2(g) NiCl2(s), G = 1,130.28 kJ