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Unit 2
Section 1

Water is Essential to Living Organisms
Makes up about 80% of cells contents
Is a reactant in lots of chem. reactions e.g. photosynthesis &
hydrolysis reactions
Is a solvent ­ substances dissolve in it. Most biological reactions take
place in solution.
Transports substances.…

Page 2

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Unit 2
Section 1

Hydrogen Bonds Give Water a High Specific Heat Capacity
Specific heat capacity ­ the energy needed to raise the temperature
of 1g of a substance by 1oC.
H bonds between water molecules can absorb a lot of energy.
So water has a high specific…


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