Compound AZ4 reacts with Y2 giving two products: AZ3Y and ZY. Calculate the A-Z bond enthalpy if the reaction releases 154.6 kJ mol¯1 and other bond enthalpies are: Y-Y 113.0 kJ mol¯1, z-Y 133.5 kJ mol¯1 and A-Y 222.2 kJ mol-1. | Z- A -Z + Y-Y + Z- A -Y + Z-Y

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