• 2022-06-06
    已知298K时下列热化学方程式: ① 2NH3(g) → N2(g) + 3H2(g) △rHmΘ = 92.2kJ·mol-1② H2(g) + 1/2O2(g) → H2O(g) △rHmΘ = -241.8kJ·mol-1③ 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g) △rHmΘ = -905.6kJ·mol-1试确定△fHmΘ(NH3,g,298k)=( ) kJ·mol-1
    A: -90
    B: -46.1
    C: 90.2
    D: 46.1