Weak interaction between slightly negatively charged oxygen atom bonded to slightly positively charged hydrogen atom.
1 of 8
Covalent bonds
Electrons shared between oxygen and hydrogen - shared electrons pulling towards oxygen & away from hydrogen atoms.
2 of 8
Good solvent
Water molecules are attracted ti ions & polar molecules e.g. glucose. Transport in blood, xylem and phloem. Good solvent for both charged and uncharged substances.
3 of 8
High specific heat capacity
4.2kJ to increase the temperature of 1kg of water. Thermal energy absorbed and used to break hydrogen bonds. Helps prevent changes in body temperature.
4 of 8
High latent heat of vaporisation
Thermal energy used to cause water molecules to turn to vapour. Transpiration (plants) & sweating/panting (animals). Small amount of water absorbs much thermal energy.
5 of 8
High cohesion
Hydrogen bonds "stick" water molecules together. Helps draw water up xylem.
6 of 8
Metabolic
Water takes part as a reactant in some chemical processes. Hydrolysis reactions & photosynthesis.
7 of 8
Incompressibility
Outside pressure cannot force water in smaller. Hydrostatic skeleton for some animals i.e. earthworm. Provides turgidity in plants.
8 of 8
Other cards in this set
Card 2
Front
Covalent bonds
Back
Electrons shared between oxygen and hydrogen - shared electrons pulling towards oxygen & away from hydrogen atoms.
Comments
No comments have yet been made