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Q. The enthalpy change during the reactionA2(g) + B2(g) → 2AB(g) isBond energy data are given as followsA – A = x kJ mol–1B – B = y kJ mol–1A – B = z kJ mol–1 x + y + zx – y – 2zx + y – 2zx + y – z

Answer» Q. The enthalpy change during the reaction
A2(g) + B2(g) → 2AB(g) is
Bond energy data are given as follows
A – A = x kJ mol–1
B – B = y kJ mol–1
A – B = z kJ mol–1



x + y + z
x – y – 2z
x + y – 2z
x + y – z


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