2.2 Water

Question 1

Hydrogen Bonds

Answer 1

• 2 H to 1 O
  -molecule H2O is polar
  -H2O is ionic bond
  -gives water properties (cohesive, adhesive, thermal, solvent)

Question 2

Cohesion

Answer 2

Binding together of two meolecules of the same type
-water stics together
-useful for water transport in plants

Question 3

Adhesion

Answer 3

Hydrogen bonds form between water and other polar molecules.
-useful in leaves (water adheres to cellulose)

Question 4

Thermal

Answer 4

1) high specfic heat capacity
2) high latent heat of vaporization
3) high boiling point

Question 5

Solvent

Answer 5

Water forms bonds with other polar molecules. Hydrogen and negative ions they are bonded to dissolve.

Question 6

High Specific Heat Capacity

Answer 6

-Hydrogen bonds reduce molecules motion
-Much heat needed to separate the bonds
-Takes much time to heat up or cool down
-Stable temperature

Question 7

High Latent Heat Of Vaporization

Answer 7

-Hydrogen bonds have to be broken to evaporate
-Evaporation has cooling effect
-Example: sweat

Question 8

High Boiling Point

Answer 8

-Highest temperature in liquid state
-High boiling point
-Broad change of temperatures (0°C to 100°C)

Question 9

Hydrophyllic

Answer 9

-Chemically attracted to water
-Dissolve in water
-Substances water adheres to
-polar molecules

Question 10

Hydrophobic

Answer 10

-Substances insoluble in water
-non polar molecules