In the profile for an exothermic reaction, the overall change is negative. You can tell this because the products have less energy than the reactants, and the arrow showing the overall change in ...

Do not attempt to perform this demonstration. The combustion of methane is an example of an exothermic reaction. More energy is released when the bonds in the products are formed than is used to break ...

reaction profiles, and explaining energy changes. If you struggled with the quiz, don't panic - we've got you! You can revise energy stores by clicking the links below.