Unit 2 i) Hydrocarbons Flashcards
Name the 3 fossil fuels?
Coal Oil Gas
Fossil fuels are finite. What does finite mean?
This means that they will eventually run out
What is combustion?
Combustion is a chemical reaction where substances burn in the presence of oxygen
What word is used to describe a reaction that gives out heat?
Exothermic
What is an endothermic reaction?
A reaction that takes in energy.
What is a fossil fuel?
Fuel from remains of long dead animals or plants. eg coal oil gas
What is the test for hydrogen?
Burns with a pop
What is the test for oxygen?
Relights a glowing splint
What is the test for carbon dioxide?
Turns lime water milky
What is a hydrocarbon?
A substance that contains only hydrogen and carbon
What is the simplest alkane?
Methane
What is the general formula of the alkanes?
CnH2n+2
What is a fuel?
A fuel is a substance which has stored energy. This energy is released when a fuel is burned
What is made when alkanes burn in excess oxygen?
Carbon dioxide and water
Name the alkanes and formulas from 1 to 8 carbons
Methane CH4 Ethane C2H6 Propane C3H8 Butane C4H10 Pentane C5H12 Hexane C6H14 Heptane C7H16 Octane C8H18