1.

For the reaction N2+3X2→2NX3 where X=F,Cl (the average bond energies are F−F=155kJ mol−1,N−F=272kJ mol−1,Cl−Cl kJ mol−1,N−Cl kJ mol−1 and N≡N=941 kJmol−1). The heats of formation of NF3 and NCl3 in kJ mol−1, respectively, are closest to

Answer»

For the reaction N2+3X22NX3 where X=F,Cl (the average bond energies are FF=155kJ mol1,NF=272kJ mol1,ClCl kJ mol1,NCl kJ mol1 and NN=941 kJmol1).
The heats of formation of NF3 and NCl3 in kJ mol1, respectively, are closest to




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