Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other?

The answer is in thermodynamics and kinetics. These two are arguably the most important concepts to grasp in chemistry.

But sometimes, even after several years of basic chemistry education, it is not easy to form a clear picture on how they govern reactivity!

Tutorial Review: Contents and Introduction

In this tutorial, we will try to introduce and summarize what these two concepts are, and their implications in chemical reactivity. This is obviously an introduction, intended for chemistry students of all levels.

For sure, there are more comprehensive explanations out there, and if you want one, go grab any of the best-known general chemistry books, or a more specific organic chemistry textbook. However, we have found that there are not many short explanations out there available for the general scientific public. This is somehow worrying, since, without a basic understanding of thermodynamics and kinetics, there is no way to understand the basic principles of reactivity. And without understanding reactivity, you are missing out on the most important part of chemistry.

But if you really want to dive on physical chemistry concepts as such, unfortunately you will find that most books can be impenetrable without a basic understanding of maths, physics and chemistry itself.

This is what we want to fix with this short tutorial. To give you a general overview on why chemical compounds react. We want to break the gate-keeping that has always been going on with physical organic chemistry!

As mentioned, this is intended to be brief. We will start off with the basic definitions, and hopefully make you go all the way through to understanding free-energy profiles of catalytic reactions.

Interested yet? Keep reading!

• A quick disclaimer: Since my background is in organic chemistry, I will base the explanations on simple organic chemical reactions, but most of the general principles apply to any kind of chemical reactivity.
• For most energy diagrams, the energy values are orientative, made up in order to explain the concepts.

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