已知下列反應在指定溫度的ΔrGθm和Kθ, (1)N2(g) + 1/2O2(g) = N2O(g) ΔrGθm1,Kθ1 (2)N2O4(g) = 2NO2(g) ΔrGθm2,Kθ2 (3)1/2N2(g) + O2(g) = NO2(g) ΔrGθm3,Kθ3 則反應2N2O(g)+3O2(g)=2N2O2(g)的ΔrGθm=(),Kθ=()。