This is according to my text : [![enter image description here][1]][1] Well I understand why more of Elimination reactions happen at high temperature(I guess this is due to $\triangle\\$*G* being more negative due to multiple product formation as well) , but why do Substitution reactions have their yields decreased as temperature goes up? This is according to [master of organic chemistry; (Even though it says that there is a relative increase, the graph shows a $decrease$ in yield of the substituted products)](website) : [![enter image description here][2]][2] Aren't they supposed to have their output increased as well,as the activation energy barrier has already passed and rate increases with increase in temperature, Or am I missing something fundamental here? Also, what could happen just after the energy barrier is broken for any one of the reactions? [1]: https://i.sstatic.net/3xTjL.png [2]: https://i.sstatic.net/c9Dl9.png