Activation energy

[Blake_Katsev_2E]

why would raising temperature affect k more rather than k' if the activation energy of k is higher?

[AndrewM2G]

The reaction with the higher activation energy essentially requires more ambient energy to initiate the reaction. Changing the temperature means changing the amount of ambient energy, so a rxn with a high activation energy is initiated more easily when there is ample energy (higher temp). A rxn with a lower activation energy will not change as much because it doesn't require as much energy to initiate, so the temp change is less significant.

[Blake_Katsev_2E]

so would that mean when the energy of products is less, raising the temperature would always lower K?

[breinhardt3G]

No, it just means that an increase in temperature won't raise k as much because not as much heat is required to overcome the lower Ea.