![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-53/ti_inject-812ce.png)
己知 298K 时下列热化学方程式: 1 2NH 3 (g) → N 2 (g) + 3H 2 (g) D r H m Θ = 92.2 kJ · mol -1 2 H 2 (g) + 1/2O 2 (g) → H 2 O(g) D r H m Θ = -241.8 kJ · mol -1 3 4NH 3 (g) + 5O 2 (g) → 4NO(g) + 6H 2 O(g) D r H m Θ = -905.6 kJ · mol -1 试确定 D f H m Θ (NO,g,298K) = kJ · mol -1