1 Chemical Thermodynamics
If the bond dissociation energies of XY, X2 and Y2 (all diatomic molecules) are in the ratio of 1:1:0.5 and ?Hf for the formation of XY is -200 kJ mol-1 . The bond dissociation energy of X2 will be
1) 400 kJ mol-1 2) 300 kJ mol-1 3) 20 kJ mol-1 4) 800 KJmol-1
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