Calculate δg∘rxn for the following reaction: 4co(g)+2no2(g)→4co2(g)+n2(g). use the following reactions and given δg∘rxn values: 2no(g)+o2(g)→2no2(g), δg∘rxn= - 72.6 kj 2co(g)+o2(g)→2co2(g), δg∘rxn= - 514.4 kj 12o2(g)+12n2(g)→no(g), δg∘rxn= 87.6 kj