Question

A2+B2→2AB. $ΔH^0_f$= -200 kJ mol-1 AB, A2 and B2 are diatomic molecule. If the bond enthalpies of A2, B2 and AB are in the ratio 1:0.5:1, then the bond enthalpy of A2 is ___ kJmol-1 (Nearest integer)

Answer 1

The correct answer is: 800