Hess's Law Worksheet

Calculate the $H$ for the reaction

$2C(s)+H_2(g)C_2{H}_{2(g)}$

$H=?$

Given the following reactions and their respective enthalpies

$C_2{H}_{2(g)}+2\mathrm{.}5O_{2}2C{O}_{2(g)}+H_2{O}_{(l)},H=-1299\mathrm{.}6kJ$

$C(s)+O_{2(g)}C{O}_{2(g)},H=-393\mathrm{.}5kJ$

$H_{2(g)}+\frac{1}{2}{O}_{2(g)}{H}_2{O}_{(l)},H=-285\mathrm{.}8kJ$