Đáp án:

Áp dụng định luật Hess:

$\begin{cases}\rm CO(g)+H_2O(g)\to CO_2(g)+H_2(g)\kern1cm\Delta H^°_1=-41,13\ kJ\\\rm COCl_2(g)\to CO(g)+Cl_2(g)\kern1cm \Delta H^°_{2'}=112,5\ kJ\\\rm CO(NH_2)_2(s)+2HCl(g)\to COCl_2(g)+2NH_3(g)\kern1cm \Delta H^°_{3'}=210\ kJ\\\rm H_2(g)+Cl_2(g)\to 2HCl\kern1cm \Delta H^°_{4'}=-184,6\ kJ\\\rm H_2O(g)\to H_2O(l)\kern1cm\Delta H^°_{5'}=44,01\ kJ\end{cases}$

$\to\rm\Delta rH^°_{298K}=\Delta H^°_1+\Delta H^°_{2'}+\Delta H^°_{3'}+\Delta H^°_{4'}+\Delta H^°_{5'}\\\kern2,35cm=(-41,3)+112,5+201+ (-184,6)+44,01\\\kern2,35cm=131,61\ kJ$