Problem: Calcium carbide (CaC2) reacts with water to form acetylene (C2H2) and Ca ( OH )2.You may want to reference (Pages 187 - 190) Section 5.7 while completing this problem.From the following enthalpy of reaction data and data in Appendix C, calculate ΔH°f for CaC2 is:CaC2(s) + 2H2O(l) → Ca(OH)2(s) + C2H2(g) ΔH° = -127.2 kJ

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Reaction: CaC2(s) + 2H2O(l) → Ca(OH)2(s) + C2H2(g) ΔH° = -127.2 kJ

Hrxn=Hf,products-Hf,reactants

Hrxn=[Hf,Ca(OH)2+(Hf,C2H2)]-[(Hf,CaC2)+(2×Hf,H2O)]

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Problem Details

Calcium carbide (CaC2) reacts with water to form acetylene (C2H2) and Ca ( OH )2.

You may want to reference (Pages 187 - 190) Section 5.7 while completing this problem.

From the following enthalpy of reaction data and data in Appendix C, calculate ΔH°f for CaCis:

CaC2(s) + 2H2O(l) → Ca(OH)2(s) + C2H2(g) ΔH° = -127.2 kJ

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