Given the following data:

$C_2{H}_2(g)+\frac{5}{2}{O}_2(g),2C{O}_2(g)+H_{2}O(l),H=-1300kJ$

$C(s)+O_2(g),C{O}_2(g),H=-394kJ$

$H_2(g)+\frac{1}{2}{O}_2(g),H_{2}O(l),H=-286kJ$

calculate $H$ for the reaction:

$2C(s)+H_2(g)C_2{H}_2(g)$