O-Level Chemistry Video: Energy Changes – Exothermic and Endothermic Reactions


Energy cannot be created or destroyed. However, it can be changed from one form to another. This is what you learned from basic Physics syllabus.

All chemical reactions involve energy changes.

Some physical changes, such as boiling or dissolving a ionic solid in water, also involve energy changes.

Two keywords in this topic called Energy Changes: Exothermic and Endothermic Changes

  • An exothermic change is a change in which heat is given out to the surroundings
  • An endothermic change is a change in which heat is absorbed from the surroundings

Let us take a look at a video to have a better understanding of both Exothermic and Endothermic Changes. I will be using physical state changes of solids, liquids and gases to introduce the concepts involved.

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Length of video: 8.37 mins

Direct link: https://youtu.be/WD58-_SJy5E

I hope you find the content easy for your understanding and if you have any questions, leave me a comment below.

Feel free to share this video with your friends who needs help in mastering Chemistry.

PS: You can do a search on the top right hand corner for more discussions and questions on “Energy Changes” or select from the suggested blog posts under “Related Articles” below.

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