Natural Chemistry

Alkanes
1. Saturated hydrocarbons
  1. Only one single covalent bond
2. C(n)H(2n+1)
3. Most hydrocarbons in crude oil are alkanes
  1. Give out large amounts of energy when burnt
4. The bigger the molecule, the higher the boiling/melting point
  1. And so the less flammable they become
5. Very flammable
6. The bonds between carbon and hydrogen atoms don't break
Empirical formula
1. Worked Example
  Annotations:
  - Benzene has the molecular formula of C6H6, what is its empirical formula? The ratio of carbon to hydrogen is 1:1, so the empirical formula would be CH.
2. Good for representing ionic compounds
Alkenes
1. C2H2
2. Unsaturated hydrocarbons
  1. The molecules have double covalent bonds
  2. More reactive than alkanes
3. Very flammable
  1. Burn in combustion reactions to produce carbon dioxide and water

Resource summary

	Created by Carmen Trinh about 7 years ago