Calculate the value of Delta H for each of the following reactions.
1. CaO(s)+2HCl(g)→CaCl2(s)+H2O(g)
Answer has 4 significant figures
2. 4FeO(s)+O2(g)→2Fe2O3(s)
Answer has four significant figures
3. 2CuO(s)+NO(g)→Cu2O(s)+NO2(g)
Answer has three significant figures
4. 4NH3(g)+O2(g)→2N2H4(g)+2H2O(l)
Answer has five significant figures
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