Bond dissociation energies of `H_(2),Cl_(2)` and `HCl_((g))` are 104, 58 and 103 kcal `"mol"^(-1)` respectively. Calculate the enthalpy of formation of HCl gas.

The bond dissociation energy of gaseous H_(2),Cl_(2) and HCl are 104,58 and 103 kcal mol^(-1) respecitvely. Calculate the enthalpy of formation for HCl gas.

The bond dissociation energies of gaseous H_(2),Cl_(2) , and HCl are 100, 50 , and 100 kcal mol^(-1) , respectively. Calculate the enthalpy of formation of HCl(g) .

The bond dissociation energies of gaseous H_(2),C1_(2) , and HC1 are 100, 50 , and 100 kcal mol^(-1) , respectively. Calculate the enthalpy of formation of HC1(g) .

Bond dissociation enthalpies of H_(2(g)) and N_(2(g)) are "426.0 kJ mol"^(-1) and "941.8 kJ mol"^(-1) , respectively, and enthalpy of formation of NH_(3(g))" is "-"46 kJ mol"^(-1) . What are the enthalpy of atomisation of NH_(3(g)) and the average bond enthalpy of N-H bond respectively ( in kJ "mol"^(-1) )?

Find Delta_(f)H of HCl (g) if bond energies of H_(2), Cl_(2) and HCl are 104, 58, 103 kcal/mol respectively.

Bond dissociation enthalpies of H_(2)(g) and N_(2)(g) are 436.0 kJ mol^(-1) and 941.8 kJ mol^(-1) , respectively, and ethalpy of formation of NH_(3)(g) is -46kJ mol^(-1) . What is the enthalpy fi atomisation of NH_(3)(g) ?. What is the avergae bond ethalpy of N-H bond?

Bond dissociation enthalpy of H_(2) , Cl_(2) and HCl are 434, 242 and 431KJmol^(-1) respectively. Enthalpy of formation of HCl is

The molar enthalpies of combustion of C_(2)H_(2)(g), C("graphite") and H_(2)(g) are -1300,-394 , and -286 kJ mol^(-1) , respectively. The standard enthalpy of formation of C_(2)H_(2)(g) is

The heat of formation of ethane is -19.46 kcal . Bond enegries of H-H, C -H and C- C bonds are 104.18, 99.0 and 80.0 kcal , respectively. Calculate the heat of atomisation of graphite.

The dissociation energies of H_2and O_2 are 104 and 118 " kcal mol"^(-1) respectively. The heat of reaction 1/2H_2(g) +1/2O_2(g) rarrO-H(g) is 10 kcal. The bond energy of O - H bond is