Endothermic vs. Exothermic Reactions Flashcards
What are endothermic reactions?
Reactions that need energy to proceed and they get their energy from the surroundings. As energy’s absorbed from their surroundings, the reaction feels cold.
What are exothermic reactions?
Reaction that releases energy. During the reaction, the energy’s released into the surroundings in the form of heat and/or light. They’re always needed for a combustion to occur.
Define a reactant.
A substance started within a chemical reaction. Energy in an exothermic reaction is from the reactants.
Define a product.
A substance formed by the chemical reaction.
Define incomplete combustion.
When the oxygen supply is low/restricted, and other reactions occur instead.
Define complete combustion.
A reaction that need oxygen fed in them.
Define corrosion.
The chemical reaction that breaks metals that are corrode when exposed to water/air/other chemicals to form other compounds.
Give examples of endothermic reactions.
- Photosynthesis uses energy from the sun
- Sherbet tingles in your mouth
- A chemical cold pack cools sore muscles
Give examples of exothermic reactions.
- A bushfire burns down a forest
- Aerobic respiration releases energy
- Magnesium burns and releases light
