The ΔH f for CaO+2HCl ->3CO2+4H2O?
- ChemTeamLv 78 years agoFavorite Answer
It would be a ΔH, not a ΔH f.
You'll need to look up the ΔH f for the four substances. Here is CaO:
The ΔH f is -635 kJ/mol for solid CaO
Here are some examples using Hess' Law and ΔH f values:
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