---
title: "Reaction energy diagrams Template | MolDraw"
url: https://www.moldraw.com/templates/concept-energy-diagrams/
description: "Reaction energy diagrams template: SN2 vs SN1, catalysed vs uncatalysed, exothermic, endothermic, and kinetic vs thermodynamic control, with Eₐ and ΔH…"
lang: en
publisher: Scidart Academy
generated: 2026-10-28
---
[MolDraw](https://www.moldraw.com/) › [Templates](https://www.moldraw.com/templates/) › [Physical chemistry](https://www.moldraw.com/templates/physical-chemistry/) › Reaction energy diagrams

[Physical chemistry](https://www.moldraw.com/templates/physical-chemistry/)Free

# Reaction energy diagrams template

![Reaction energy diagrams template: SN2 vs SN1, catalysed vs uncatalysed, exothermic, endothermic, and kinetic vs thermodynamic control, with Eₐ and ΔH marked.](https://www.moldraw.com/templates/download/concept-energy-diagrams.svg)

[Edit in MolDraw](https://www.moldraw.com/)[Download SVG](https://www.moldraw.com/templates/download/concept-energy-diagrams.svg)

Free template. Download it, or open it in MolDraw to change it first.

SN2 vs SN1, catalysed vs uncatalysed, exothermic, endothermic, and kinetic vs thermodynamic control, with Eₐ and ΔH marked.

## What the template shows

- Energy against reaction progress: transition states (‡), intermediates, activation energy (Eₐ) and enthalpy change (ΔH)
- SN2: one step
- Bond making and breaking happen together
- transition state ‡
- SN1: two steps
- A carbocation intermediate sits in a dip between two transition states
- A catalyst gives a new route with a lower Eₐ; ΔH is unchanged
- Products are lower in energy: heat is released (ΔH < 0)
- Products are higher in energy: heat is taken in (ΔH > 0)
- Kinetic vs thermodynamic control
- The lower barrier wins when cold and fast; the lower product wins when warm and reversible
- kinetic product
- thermodynamic product
- The highest transition state on the path sets the rate (the rate-determining step).
- Eₐ is measured from the starting level up to the transition state; ΔH from reactants to products.

Drawn with 497 shapes – every one editable in MolDraw.

## Sources

- [Atkins, de Paula & Keeler, Atkins' Physical Chemistry, 11th ed., OUP 2018](https://openlibrary.org/isbn/9780198769866) Textbook
- [Clayden, Greeves & Warren, Organic Chemistry, 2nd ed., OUP 2012, ch. 12](https://openlibrary.org/isbn/9780199270293) Textbook

## How to use this template

1. Press **Edit in MolDraw**. The template opens on the canvas of the free MolDraw editor.
2. Change anything: move structures, edit atoms and labels, recolour highlights or delete what you do not need.
3. Add your own structures, arrows and text next to it, or combine several templates on one page.
4. Export the drawing as PNG, SVG or PDF for slides, worksheets, theses and papers.

## Frequently asked questions

### Is the Reaction energy diagrams template free?

Yes. The Reaction energy diagrams template is one of the free MolDraw templates: open it in the editor or download it from this page as SVG or PNG and use it in your slides, worksheets and notes.

### Can I edit the Reaction energy diagrams template?

Yes. It opens as an ordinary MolDraw drawing, so every structure, arrow, label and colour can be changed, and you can add your own content around it.

### Is the chemistry checked?

Every structure is checked with RDKit and every curly arrow passes MolDraw’s electron-flow audit. The sources used are listed on this page.

### Are activation energy and ΔH labelled?

Yes. Ea, ΔH, transition states and intermediates are labelled on each profile.

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