IG Chem – Exothermic and Endothermic Reactions

Exothermic reactions transfer thermal energy to the surroundings.

Combustion and respiration are examples of endothermic reactions.

Endothermic reactions absorb thermal energy from the surroundings.

The temperature decreases in an exothermic reaction.

Photosynthesis is an example of an endothermic reaction.

When magnesium ribbon is added to hydrochloric acid, the reaction is endothermic.

Sodium hydrogen carbonate reacts with hydrochloric acid in an endothermic reaction.

Energy changes in reactions can be measured using a calorimeter.

Combustion of fuels is an endothermic process.

Dissolving ammonium nitrate in water is an example of an exothermic reaction.

The energy transferred when a fuel burns can be measured using calorimetry.

Nitrogen oxide formation from nitrogen and oxygen is an endothermic reaction.

Cold packs use endothermic reactions to help keep things cool.

The reaction between hydrochloric acid and sodium hydrogen carbonate results in a temperature increase.

In exothermic reactions, the energy released when new bonds form is less than the energy required to break the bonds of the reactants.