?Calcium carbide \(\left(\mathrm{CaC}_{2}\right)\) reacts with water to form acetylene
Chapter 5, Problem 5.76(choose chapter or problem)
Calcium carbide \(\left(\mathrm{CaC}_{2}\right)\) reacts with water to form acetylene \(\left(\mathrm{C}_{2} \mathrm{H}_{2}\right)\) and \(\mathrm{Ca}(\mathrm{OH})_{2}\). From the following enthalpy of reaction data and data in Appendix C, calculate \(\Delta H_{f}^{\circ}\) for \(\mathrm{CaC}_{2}(s)\) :
\(\mathrm{CaC}_{2}(s)+2 \mathrm{H}_{2} \mathrm{O}(l) \longrightarrow \mathrm{Ca}(\mathrm{OH})_{2}(s)+\mathrm{C}_{2} \mathrm{H}_{2}(g) \Delta H^{\circ}=-127.2 \mathrm{~kJ}\)
Text Transcription:
(CaC2)
(C2H2)
Ca(OH)2
\Delta H_{f}^{\circ}
CaC2(s)
CaC2(s) + 2 H2O(l) \longrightarrow Ca1OH22(s) + C2H2(g) \Delta H^{\circ} = -127.2 kJ
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