Water
- Created by: iloverevision:)
- Created on: 01-03-19 21:52
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Water
- major component of cells
- very abundant
- water is dipolar molecule
- made up of 2 hydrogen atoms & 1 oxygen atom
- oxygen atom has slight negative charge
- hydrogen has slight positive charge
- water has both negative & positive poles
- made up of 2 hydrogen atoms & 1 oxygen atom
- water & hydrogen bonding
- positive pole of 1 water molecule attracted to negative pole of other
- attractive force - hydrogen bond
- relatively weak
- one tenth strength of covalent bond
- huge numbers in water
- significant force & responsible for many unusual properties
- relatively weak
- attractive force - hydrogen bond
- positive pole of 1 water molecule attracted to negative pole of other
Properties of Water
- specific heat capacity
- water molecules stick together - hydrogen bonding
- takes lots of energy to seperate
- why water has higher boiling point than predicted
- amount of water needed to change 1kg of substance by 1 degrees celcius
- SHC of pure water = 4190
- water molecules stick together - hydrogen bonding
- latent heat of vaporisation
- amount of energy needed to evaporate 1g of water
- when substance changes from liquid to gas - energy required
- potential energy stored in forces between molecules need to be…
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