Chemical reaction
From Simple English Wikipedia, the free encyclopedia
A chemical reaction happens when one or more chemicals are changed into one or more other chemicals. Examples:
- iron and oxygen combining to make rust
- things burning or exploding
- many reactions that happen inside living things
Some reactions are very fast, and others are very slow. Some happen at different speeds, depending on temperature or other things. For example, wood does not react with air when it is cold, but if it is made hot enough, it will start to burn.
Some reactions give out energy. These are called exothermic. For other reactions, energy must be put in to make them happen. These are called endothermic.
[edit] External links
- Rates of reaction
- Online Chemical Equation Balancer Balances equation of any chemical reaction (full or half-cell) in one click.
