Given that the food energies of `:N-=N` is kJ `"mol"^(-1)` , H-H is 435 kJ `"mol"^(-1),N-N` is 159 kJ `"mol"^(-1)`, and N-H is 389 kJ `"mol"^(-1)` , the heat of formation of hydrazine in the phase in kJ `"mol"^(-1)` is :

Given that the food energies of :N-=N is 946kJ "mol"^(-1) , H-H is 435 kJ "mol"^(-1),N-N is 159 kJ "mol"^(-1) , and N-H is 389 kJ "mol"^(-1) , the heat of formation of hydrazine in the phase in kJ "mol"^(-1) is :

For the reaction N_(2)+3X_(2) to 2NX_(3) where X=F, Cl (the average bond energies are F-F = 155 kJ "mol"^(-1) N-F = 272 kJ "mlo"^(-1) , Cl-Cl = 242 kJ "mol"^(-1) , N-Cl= 200 kJ "mol"^(-1) and N -=N = 941 kJ "mol"^(-1) ), the heats of formation of NF_(3) and NCl_(3) in kJ "mol"^(-1) , respectively, are closest to

Based on the values of B.E. given, Delta_(f)H^(0) " of " N_(2)H_(4(g)) is : Given BE of : N- N is 159 kJ mol^(-1) , H-H is 436 kJ mol^(-1), N =- N is 941 kJ mol^(-1), N-H is 398 kJ mol^(-1)

Given that bond energies H-H and Cl-Cl are 430 kJ mol^(-1) and 240 kJ mol^(-1) respecively and Delta_(f) H for HCl is - 90 kJ mol^(-1) . Bond enthalpy of HCl is :

Given the bond energies of H - H and Cl - Cl are 430 kJ mol^(-1) and 240 kJ mol^(-1) , respectively, and Delta_(f) H^(@) for HCl is - 90 kJ mol^(-1) . Bond enthalpy of HCl is

Given the bond energies of H - H and Cl - Cl are 430 kJ mol^(-1) and 240 kJ mol^(-1) , respectively, and Delta_(f) H^(@) for HCl is - 90 kJ mol^(-1) . Bond enthalpy of HCl is

Bond enthalpies of H-H, Cl-Cl and H-Cl bonds are 434 kj mol^(-1) , 242 kj mol^(-1) and 431 kj mol^(-1) , respectively. Enthalpy of formation of HCl is