The conversion of hydrogen and oxygen into liquid water can happen in three steps. 1. $2\text{H}_2(g) + \text{O}_2(g) \rightarrow 4\text{H}(g) + 2\text{O}(g)$ 2. $4\text{H}(g) + 2\text{O}(g) \rightarrow 2\text{H}_2\text{O}(g)$ 3. $2\text{H}_2\text{O}(g) \rightarrow 2\text{H}_2\text{O}(l)$ Which of these steps are exothermic?
- A1, 2 and 3
- B1 and 2 only
- C2 and 3 only
- D2 only