Hydrocarbons

Question 1

What two elements do hydrocarbons contain?

Answer 1

Carbon and Hydrogen atoms only

MUST INCLUDE ONLY

Question 2

What are alkanes

Answer 2

Saturated hydrocarbons of a general formula: CnH2n+2

Question 3

What two waste products form from the complete combustion of hydrocarbons?

Answer 3

Carbon dioxide and Water vapour

Question 4

Describe the physical properties of alkanes

Answer 4

First few are gassed then change to liquids then to solids
Boiling points and melting points and viscosity-thickness- increases as molecules get bigger
Volatility and flammability decreases as molecules get bigger
Poor reactivity

Question 5

Describe the combustion of hydrocarbons

Answer 5

• Exothermic reaction occurring when hydrocarbons are reacted with oxygen
  • Complete combustion produces CO2 and H2O
  • Incomplete combustion produces Carbon or Carbon monoxide and water