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At 25^(@)C the activation energy for a catalysed reactionis 126KJ mol^(-1) and for uncatalysedreactionis 350 KJ mol^(-1) . Howmany timesthe ratesis increased in thepresenceof catalyst ? |
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Answer» Solution :According to Arrhenius equation, the specific rates (k) of a REACTION with different ACTIVATION energies `(E_(a))` are given as `log.(k_(1))/(k_(2))=(1)/(2.303RT)[E_(a_(2))-E_(a_(1))]=((350-162)1000)/(2.303xx8.314xx298)` THEREFORE the RATIO of rates, `k_(1)//k_(2)=8.9xx10^(32)`. In the PRESENCE of a catalyst rate is increased by `8.9xx10^(32)` times. |
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