Chemical changes Flashcards
Interactions between matter can result in?
Physical changes and chemical changes.
How does a chemical change occur?
A change in new substances
Substances that react with each other are?
Reactants
What is given off or taken in during a chemical reaction?
Energy
What is used to show the substances that are involved in chemical reactions?
Word equations
What is combustion?
A chemical reaction in a substance is heated in the presence of oxygen to form one or more new substances.
What is given off during combustion?
Heat and light
Thermal decomposition?
The process in which a substance breaks down into two or more simpler substances
Oxidation?
When a matter interacts with oxygen.
How does oxidation occur?
When a substance gains oxygen, it undergoes a chemical change which is known as oxidation.
Neutralisation?
When an acid and alkali is mixed a reaction occurs which is neutralisation.
How do chemical changes occur?
Mixing , heating , exposure to light and interaction with oxygen
