Functions of water
- Water is a reactant in chemical reactions, like photosynthesis or hydrolysis.
- Water transports substances, it is a liquid, solvent and very cohesive so it can transport all sorts of materials.
- Water helps with temperature control because it has a high specific heat capacity and a high latent heat of evaporation.
- Water is a habitat and because it helps with temperature control, is a solent and becomes less dense when it freezes means many organisms can survive and reproduce in it.
Polarity of water
- Water consists of two hydrogen atoms and an oxygen atom.
- The shared negative hydrogen is pulled towards the oxygen leaving the hydrogen atom slightly positive.
- The unshared electrons on the oxygen atom make it slightly negative.
- This makes water slightly polar.
- Hydrogen bonds are weak intermolecular forces between the slightly positive charge on a hydrogen atom and a slightly negative charge on an oxygen atom from another molecule.
- Hydrogen bonds are responsible for most of waters properties.
Properties of Water
Water has a high specific heat capacity:
The energy needed to raise the temperature of 1 gram of a substance by…