3.1.7 water

Five properties of water

Dipolar molecule 1

Has large latent heat of vaporisation 2

has high specific heat capacity 3

strong cohesion between water molecules 4

Explain meaning of 1

Water has unevenly distributed charge because of hydrogen and oxygen so hydrogen acts as a good solvent because polar molecules dissolve in water and by forming hydrogen bonds due to attraction to the molecules

Why reason one is important? (Two points)

Allows for the transport of materials through organisms

allows for chemical reactions to occur in water

True or false hydrophobic means molecules which dissolve in water and hydrophilic means non-polar molecules which don't dissolve in water

False the other way around

Explain meaning of 2

Absorbs lots of heat energy before it evaporates So water removes a lot of heat energy when it evaporates Water provides a cooling effect through evaporation with little water loss

Why is 2 crucial? (2)

so the relatively stable temperature of water means the internal temperature of organisms should be relatively constant because most of our bodies are made up of water

Stable environment for aquatic organisms

Explain the meaning of three

Lots of energy Is required to To increase the temperature of water so water can act as a temperature buffer

What is three crucial?

Explain the meaning of four

Water molecules can support a continuous column of water Such as four transpiration in asylum

Why is 4 crucial

Cohesion of water molecules provides surface tension to water So small invertebrates can live on the surface away from land predators

Water acts as a blank in metabolic reactions and define your word

Metabolite, which is a product or reactant involved in metabolism

Examples of metabolic reactions

Respiration, photosynthesis hydrolysis condensation