Chemical reactions Flashcards
What is a combustion reaction
A combustion reaction is when fuel, oxygen and heat are present which results in burning. The fuel reacts with the oxygen to produce heat.
What are the products of combustion when there is plenty of oxygen present
Carbon dioxide and water
Is a combustion reaction exothermic or endothermic
Exothermic
What is an endothermic reaction
It is a reaction when heat is taken in from the surroundings
What is an exothermic reaction
It is a reaction when heat is give out
What are the products of combustion when oxygen is in limited supply
Carbon monoxide and water
Give four examples of fuels
Methane, oil, wood, coal and wax
How would you put out a combustion reaction
our would take away one of the necessary components for combustion
What type of reaction is oxidation
It is a reaction where oxygen is added to a substance
When is an oxide formed
When only oxygen is added to a substance
What are three ways of knowing that a chemical reaction has occurred
A colour change, a temperature change and a new product formed
When can rusting occur
When iron comes into contact with water and oxygen.
What is thermal decomposition
It is when heat breaks down a substance
Is thermal decomposition a endothermic of exothermic reaction
Endothermic
What is a catalyst
It is a substance which speeds up chemical reactions by taking the route which requires less activation energy
