In this video Paul Andersen explains how heat can be absorbed in endothermic or released in exothermic reactions. An energy diagram can be used to show energy movements in these reactions and temperature can be used to measure them...

If you stick water in the freezer, it will take a few hours to freeze into ice. How is it, then, that cold packs go from room temperature to near freezing in mere seconds? John Pollard details the chemistry of the cold pack, shedding...

In this video Paul Andersen explains the important properties of solutions. A solution can be either a solid, liquid or gas but it must be homogeneous in nature. The solutes can not be separated with a filter and so either...

A chemical reaction or process that absorbs heat from the surrroundings.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

In this video, the speaker discusses a required practical activity on the chemistry specification which involves investigating how increasing the concentration of a reactant increases the rate of reaction by collecting a gas. The speaker...

Learn the basics about solubility rules for insoluble salts, as part of the overall acids, bases and alkali topic.

Ammonium nitrate stored in a warehouse is seen by the Lebanese government as the most likely source of the explosion that ripped through Beirut on August 4.

On August 4th a major blast in Beirut destroyed a major part of the city, injured thousands and killed at least 200. This is obviously incredibly tragic, especially for an already struggling country like Lebanon. So in this video we...

On Tuesday news spread about a huge explosion in Beirut (Lebanon). At the time it was unclear where the blast came from and what impact it would have. Just over a day later we now want to run through what we currently believe happened,...

Learn about the Haber Process and the uses of Ammonia within the overall reactions topic.

Usually produced in small pallets, ammonium nitrate is capable of self-combustion in sufficiently high temperatures.

Learn the basics about properties of ionic substances as a part of ionic bonding within properties of matter.

Learn the basics about Ionic Compounds, how they are formed and what their properties are.