T520: Exothermic and Endothermic Reactions – Hot and Cold Packs. Introduction. Commercial heat packs (containing iron and water, or supersaturated sodium acetate) and cold packs (various ammonium ...

Two dry solids --- barium hydroxide and ammonium nitrate --- are mixed to produce an endothermic reaction. ... To Conduct Demonstration. Mix the two solids together in a 250mL beaker. Stir for a few ...

The nitrogen triiodide is so unstable that the slightest touch will cause it to decompose in an exothermic reaction. The demonstration shown in this video is very dangerous. Do not attempt to perform ...

When endothermic reactions take in energy, the temperature of the surroundings decreases. Find out more about GCSE Chemistry. Chemical reactions and energy changes. Now playing video 2 of 4.

KS3 Chemistry Chemical reactions learning resources for adults, children, parents and teachers. BBC Homepage. ... Endothermic reactions are the opposite. Writing word equations .

IT is generally agreed that the oxidation of hydrocarbons occurs by steps such as: The initial stage of oxidation as depicted by (1) is endothermic, while (2) and (3), and also many subsequent ...