2.2 - Water

Question 1

What type of bonding occurs WITHIN a water molecule and BETWEEN water molecules?

Answer 1

WITHIN: covalent
BETWEEN: hydrogen

Question 2

Define a polar molecule.

Answer 2

Molecule which has an uneven distribution of charges

Question 3

Outline how hydrogen bonding occurs between water molecules.

Answer 3

Slightly negative oxygen of one water is attracted to slightly positive hydrogen of another water!

Question 4

Outline cohesion.

Answer 4

Hydrogen bonding occurs between water molecules

Question 5

Outline adhesion.

Answer 5

Attraction between water molecules and other molecules (xylem vessel for example)

Question 6

What are the three thermal properties of water?

Answer 6

1. HIGH SPECIFIC HEAT CAPACITY - can absorb a lot of energy without temperature changes!
2. HIGH BOILING POINT
3. HIGH HEAT OF EVAPORATION - takes a loooot of energy to change from liquid to gas

Question 7

How do the properties of water allow living organisms to survive?

Answer 7

1. Cohesion
   - surface tension
   - water can move up xylem vessel (with adhesion forces)
2. Adhesion
   - water can move up xylem vessel
3. ## Thermal