Calculate $H_{rxn}$ for the following reaction:

$C{r}_2{O}_3(s)+3CO(g)2Cr(s)+3C{O}_2(g)$

Use the following reactions and given $H$ values:

$2Cr(s)+\frac{3}{2}{O}_2(g)C{r}_2{O}_3(s),H=-1134\mathrm{.}7kJ$

$CO(g)+\frac{1}{2}{O}_2(g)C{O}_2(g),H=-282\mathrm{.}7kJ$

Express your answer in kilojoules to three significant figures.