Commercial heat packs (containing iron and water, or supersaturated sodium acetate) and cold packs (various ammonium salts) can be used to show exo- and endothermicity. Heat packs that contain iron ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

To make a safe, portable form of heating to take to the rest of the team working up on the glacier. All combustion reactions (such as the burning of coal) are exothermic. Incredibly, the reaction ...

Students explore the concept that chemical reactions involve the breaking of bonds between atoms in the reactants, and the rearrangement and rebonding of these atoms to make the products. Students ...

You probably know that humans are warm-blooded, while creatures like snakes are cold-blooded. Remember, Scientists prefer the terms endothermic and ectothermic. Snakes are ectothermic which means they ...

The search for non-chemical methods to control soil-borne pathogens has recently intensified considering the coming phase-out of methyl bromide in 2005, and none of the alternatives to methyl bromide ...