A reversible reaction is defined as a chemical reaction where the reactants and the products react together to give the reactants back.
The reaction is:
H2O+O⟶2OH , ΔH=−72kJ; Ea=77kJ/mol
2OH⟶H2O+O , Ea=? (Refer to Image)
Ea for the reverse reaction
=(Ea)forward+ΔH
=77+(−72)=5kJ
A reversible reaction is denoted by a double arrow pointing both directions in a chemical equation. For example, a two reagent, two product equation would be written as. A + B ⇆ C + D. In simple words, we can say that it is a reaction involving the simultaneous conversion of reactants to products and vice versa.
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