Answer to Question #199842 in General Chemistry for Web

Question

Given the following data, calculate the ∆H for the reaction: CaC₂(s) + 2H₂O(l) → Ca(OH)₂(aq) + C₂H₂(g).

Data:

Ca(s) + 2C(graphite) -> CaC2(s) delta H= -62.8 kJ

Ca(s) + 1/2O2(g) -> CaO(s) delta H= -635.5 kJ

CaO(s) +H2O(l) -> Ca(OH)s (aq) delta H= -653.1 kJ

C2H2(g) + 5/2O2(g) -> 2CO2(g) + H2O(l) delta H= -1300. kJ

C(graphite) + O2(g) -> CO2(g) delta H= -393.5 kJ

Answer 1

$ΔH= -712.8 kJ$