We are asked to calculate the value of ΔH˚ for CaO(s) + 2 HCl(g) → CaCl2(s) + H2O(g)
Note that we need to multiply each ΔH˚ by the stoichiometric coefficient since ΔH˚ is in kJ/mol.
Balanced reaction : CaO(s) + 2 HCl(g) → CaCl2(s) + H2O(g)
You may want to reference (Pages 187 - 190) Section 5.7 while completing this problem.
Using values from Appendix C, calculate the value of ΔH˚ for each of the following reactions.
CaO(s) + 2 HCl(g) → CaCl2(s) + H2O(g)
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