#1: Reversible Reactions & Equilibrium Explained

Link to video: [https://youtu.be/f9RKZZNvTOc ]

Start here if you’re new to the topic. This video covers the fundamentals of reversible reactions and explains how equilibrium is established when the forward and backward reactions happen at the same rate.

By the end of this video, you’ll be able to:

• Understand that reversible reactions proceed in both directions.
• Describe what is meant by the "equilibrium position” in a chemical reaction.

#2: Exothermic vs. Endothermic Reactions

Link to video: [https://youtu.be/FjhmYkY4zg0 ]

Once you understand equilibrium, it’s time to look at the energy side of reversible reactions. This video makes exothermic and endothermic reactions simple to tell apart - and shows how a single reversible reaction can be exothermic in one direction and endothermic in the other.

By the end, you'll be able to:

1. Identify if a reaction gives off heat (exothermic) or absorbs it (endothermic).
2. Understand how reversible reactions are exothermic in one direction and endothermic in the other.
3. Recognise real-life examples of each type of reaction.

#3: How Temperature, Pressure, & Concentration Affect Equilibrium

Link to video: [https://youtu.be/h60sqw-GnZ4 ]

Now that you know what equilibrium is and how energy moves in a reversible reaction, this video ties it all together - showing exactly how changing temperature, pressure, and concentration shifts the position of the equilibrium.

This is a core topic for GCSE & iGCSE Chemistry, and one that comes up again and again in exam questions - so it’s worth watching more than once.

Pro Tip: Watch these videos in the right order

For the best results, we’d recommend watching these in sequence:

1. Reversible Reactions & Equilibrium Explained - build the foundation.
2. Exothermic vs. Endothermic Reactions - understand the energy changes involved.
3. How Temperature, Pressure, & Concentration Affect Equilibrium - see how conditions shift the balance.

Ready to test yourself? Head to our YouTube channel or sign up to watch the FULL videos on our website, then try our Test & Learn questions on equilibrium and reversible reactions.