Water and its functions

Question 1

Inter-mollecular forces of water

Answer 1

+Dipolar
+Hydrogen bonding

Question 2

Specific heat capacity of water

Answer 2

Due to the high inter-mollecular forces, it takes more energy to separate the molecules.
∴, water acts as a buffer against sudden temperature.

Question 3

Latent heat of vapourization

Answer 3

Energy needed to evaporate 1g of water.
It high due to the H bonds.

Question 4

Cohesion and surface tension in water

Answer 4

The tendency of water molecules to stick together is called cohesion.
This allows it to be pulled through Xylem.
When water meets air, they tend to be pulled back into the body of water. This is called surface tension.

Question 5

The importance of water to living-organisms

Answer 5

Water in Metabolism
Water as a solvent

Question 6

Water in metabolism

Answer 6

Water is used in hydrolysis reactions
Chemical reactions take place in aqueous medium
Water is a major raw material in photosynthesis

Question 7

Water as a solvent

Answer 7

Water readily dissolves in
+O,CO2
+Ammonia and urea
+Inorganic ions and small
hydrophyllic molecules
+Enzymes

Question 8

Other important features of water

Answer 8

Evaporation cools down organisms and allows them to control the body temperature
Not easily compressed and provides support
It is transparent so light can penetrate through for photosynthesis