H_2 + Cl_2 rarr 2HCl , DeltaH_1, N_2 + 3H_2 rarr 2NH_3, DeltaH_2 and NH_3 + 3Cl_2 rarr NCl_3 + 3HCI, DeltaH_3. Then calculate the heat of formation of nitrogen trichloride.

H_2 + Cl_2 rarr 2HCl , DeltaH_1, N_2 + 3H_2 rarr 2NH_3, DeltaH_2 and N

1.	H_2 + Cl_2 rarr 2HCl , DeltaH_1, N_2 + 3H_2 rarr 2NH_3, DeltaH_2 and NH_3 + 3Cl_2 rarr NCl_3 + 3HCI, DeltaH_3. Then calculate the heat of formation of nitrogen trichloride.
Answer» ANSWER :`DeltaH2 + DeltaH_2//2 - 3DeltaH-1//2`