Which of the following relations are correct if ΔH represents only magniude ?
A
Exithermic reactions : Ea(f)+ΔH=Ea(b)
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B
Endothermic reactions : Ea(f)=Ea(b)+ΔH
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C
Exothermic reactions : ΔH>Ea
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D
Endothermic reactions : ΔH<Ea
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Solution
The correct options are A Exithermic reactions : Ea(f)+ΔH=Ea(b) B Endothermic reactions : Ea(f)=Ea(b)+ΔH C Endothermic reactions : ΔH<Ea As we know, For any reaction, ΔH=Ea(f)−Ea(b)