Resonance in X2Y can be represented as The enthalpy of formation of ) g ( Y X ) g ( Y Y 1 ) g ( X X — JEE Mains Chemistry Past Papers Chemistry Question

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Resonance in X2Y can be represented as The enthalpy of formation of ) g ( Y X ) g ( Y Y 1 ) g ( X X Y X 2 is 80 kJ mol–1. The magnitude of resonance energy of X2Y is__________kJ mol–1. (nearest integer value) [Given: Bond energies of X X, X = X, Y = Y and X + Y are 940, 410, 500 and 602 kJ mol–1 respectively]. Valence X : d, Y: 2