More about water
- water is a chemical
- when water changes phase, its physical properties change - melting, freezing, condensation and evaporation
- water is quite unique in that liquid, solid and vapour forms all occur in human ambient temperature ranges.
- water is polar – electron sharing leads to an uneven distribution of charge across the molecule. This makes water molecules electrically attracted to the surfaces, and sensitive to electric fields.
- water’s action on materials is compounded by temperature - this is why relative humidity is a useful measure
- the phase state of water depends on the temperature and pressure
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