Now this topmost apex of the hill describes the energy of the transition state of this chemical reaction. And if you, if you recall from organic chemistry, the transition state is not something that exists for a very long time and that's because it has a very high energy value. As can be seen by the following diagram, this apex has the highest energy value in that reaction. And that's precisely why the transition state does not exist for a very long time. And in fact, because it doesn't exist for a very long time, it's unstable. And we can't actually study how the transition state looks like.