Properties of alcohols
- Created by: une-meduse
- Created on: 14-05-13 20:48
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- PROPERTIES OF ALCOHOLS
- Volatility
- Alcohols have a lower volatility than alkanes of similar molecular mass
- This is due to the presence of hydrogen bonds
- The ease that a liquid turns into a gas
- Volatility increases as boiling point increases
- Alcohols have a lower volatility than alkanes of similar molecular mass
- Boiling points
- Alcohols have relatively high melting and boiling points
- This results from the presence of hydrogen bonds between the alcohol molecules
- Alcohols have relatively high melting and boiling points
- Solubility
- Alcohols dissolve in water
- This is because hydrogen bonds form between the polar (slightly negative) OH groups on the alcohol and the (slightly positive) H on the water molecule
- The first three members of the alcohols homologous series are all soluble in water
- Solubility decreases as chain length increases, the non polar hydrocarbon chain is insoluble - only OH is soluble
- The first three members of the alcohols homologous series are all soluble in water
- This is because hydrogen bonds form between the polar (slightly negative) OH groups on the alcohol and the (slightly positive) H on the water molecule
- When water and ethanol are mixed, hydrogen bonds form between water and ethanol - this draws the molecules closer together than just ethanol or just water
- This reduces the volume - heat is also generated as the hydrogen bonds form
- Alcohols dissolve in water
- Volatility
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