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Outline the thermal properties of water (the cooling effect of evaporation)

Water can evaporate at temperatures below boiling point. Hydrogen bonds have to be broken to do this. The heat energy needed to break the bonds is taken from the liquid water, cooling it down.

Explain the relationship between the
properties of water and its uses in
living organisms as a coolant

Evaporation (thermal-cooling effect of evaporation) of water from plant leaves (transpiration) and from the human skin (sweat) has useful cooling effects. Water can be used as a coolant

Explain the relationship between the
properties of water and its uses in
living organisms as a medium for metabolic reactions

solvent properties- Most chemical reactions in living organisms take place with all of th substances involved in the reactions dissolved in water
Thermal properties (boiling point)- Water is below boiling point almost everywhere on Earth, and in most areas it is above freezing point. As a liquid, rather than a solid or a gas, it can act as the medium for metabolic reactions

Explain the relationship between the
properties of water and its uses in
living organisms as a transport medium

cohesion- Strong pulling forces can be exerted to suck columns of water up to the tops of the tallest trees in their transport systems. These columns of water rarely break. Water is used as a transport medium in the xylem of plants
Solvent properties- the solvent properties of water allow many substances to be carried dissolved in water in the blood of animals and the sap of plants. Water can be used as a transport medium
Thermal properties (heat capacity)- Blood, which is mainly composed of water, can carry heat from warmer parts of the body to cooler parts. Blood is used as a transport medium for heat.

Distinguish between organic and
inorganic compounds.

Compounds containing carbon that are found
in living organisms (except hydrogencarbonates,
carbonates and carbon dioxide) are regarded as

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