OCR Chemistry C7 Notes

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  • Created by: Ryan Bird
  • Created on: 01-05-13 15:54
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Chemistry C7 Overview
· Are a group of hydrocarbons
· The carbon atoms are joined together by single carbon-carbon bonds
· All carbon atoms are linked to four carbon or hydrogen atoms by single bonds
· Only contain single bonds, so they are saturated hydrocarbons
· Don't react with aqueous reagents because the C-C and C-H bonds are strong and unreactive
· Burn in air to produce carbon dioxide and water
Alkane Methane Ethane Propane Butane
Molecular Formula CH4 C2H6 C3H8 C4H10
Displayed formula
Alcohols CnH2n+1OH
·Ethanol can be used as a solvent or a fuel
·Methanol can be used as a chemical feedback or in the manufacture of cosmetics
Alcohol Methanol Ethanol
Molecular Formula CH3OH C2H5OH
Displayed formula
Boiling point Melting point Density From this table we can see the
(°C) (°C) (g/cm3) hydrocarbon chain behaves like
the Alkane.. Less dense than
Alcohol 78 -114 0.79 water. Also, the ­OH group
Water 100 0 1.0 behaves like water, which explains
the higher than expected boiling
Alkane -89 -183 0.546 point.
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