Combustion 2.3 Flashcards
When a substance burns it reacts with oxygen what is this reaction called
A combustion reaction
Are all combustion reactions exothermic or endothermic
Exothermic
Why are combustion reactions exothermic
Because they release energy usually in the form of heat
What is the opposite of a exothermic reaction
An endothermic reaction
What are the to fuels that are required in a combustion reaction
Alkanes and alcohols
What do all alcohols and hydrocarbons burn in
A plentiful supply of oxygen
When hydrocarbons and alcohols burn in oxygen what does it produce
Carbon dioxide and water
what is to test for carbon dioxide
Limewater
if carbon dioxide is present what happens to the lime water
colourless to milky white
what gas is prodused due to the lack of oxygen
carbon momoxide
Test for CO2
Lime water
Clear- cloudy
Test for H2O
Cobalt chloride
Blue- pink
What is the incomplete combustion
Carbon monoxide and soot
Why is carbon monoxide and soot an incomplete combustion
Due to not enough oxygen
Gases can be reduced by doing what
Make sure there is enough oxygen
Remove sulfur before burning the fuel
