ТасуирлауDry Air NOx Composition vs Temperature.svg
English: The approximate equilibrium composition of common nitrogen oxides in dry air vs. temperature at 1 atmosphere of pressure. Non-reactive species are ignored. Ideal pure-component fugacity and ideal mixing were assumed for the composition dependence of the mixture components' chemical potentials. Constant heat capacity was assumed for the temperature dependence of the pure-component enthalpy and entropy (whence chemical potential).