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What is Activation Energy (E_(a))?Explain graph of reaction of activation energy and write about its probability. |
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Answer» Solution :The energy required to form the intermediate,called activated complex (C ).Is known as activation energy `(E_(a))` or The MINIMUM energy required to convert reactant to the product is called KINETIC energy of reaction. Explanation of activation energy with the help of graph 2 mole.HI is formed by the reaction of 1 MOL `H_(2)` with 1 mole `I_(2)` `H_(2(g))+I_(2(g))to2HI_((g))` According to Arrhenius ,this reaction can take place only when amolecule of hydrogen and a molecule of iodine collide to form an ustable intermediate. It EXISTS for a very short time and then breaks up to form two molecules of Hydrogen iodide.  The energy required to form this intermediate called activated complex (C ) ,is known as activaition energy `(E_(a))`  Activated Energy `(E_(a))`= (Potential energy of intermediate complex (C))-(Potential energy of reactants) The probability of reaction and `E_(a)` (i)The COLLISION of molecules with more kinetic energy than `E_(a)` result into product (ii)The collision of molecules with less kinetic energy than `E_(a)` do not form product. (iii)`E_(a)ge` energy of collide -molecule than product will form . (iv)According to Arrhenius energy of activation and rate of reaction is related as `k=Ae^((-E_(a))//(RT))` and In k=In A-`(E_(a))/(RT)` |
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