Emergent Properties of Water
The videos below describe the emergent properties of water and the underlying chemical mechanism for each of them.
TOPIC DIRECTORY AND ASSOCIATED READING
1. Density of Frozen Water (Properties of Water min 4:02-6:15). Also, see the extra videos posted below Properties of Water. ASSOCIATED READING: Campbell Bio pg 48. OpenStax pg 48-49
2. Specific Heat of Water (Properties of Water min 6:15-7:07). Extra video posted below Properties of Water. ASSOCIATED READING: Campbell Bio pg 46-47. OpenStax pg 49-50
3. Cohesion, Surface Tension, Adhesion (Properties of Water min 7:08-8:54). ASSOCIATED READING: Campbell Bio pg 45. OpenStax pg 50-51
4. Water as a Solvent (Properties of Water min 8:55-9:50): ASSOCIATED READING: Campbell Bio pg 48-49. OpenStax pg 50
KEY GOALS AND CONCEPTS
- Draw a water molecule and its partial charges.
- Draw a hydrogen bond between two water molecules.
- List and define the four emergent properties of water that facilitate life.
- How/why do each of the emergent properties of water facilitate life?
- Which form of water is less dense: liquid or solid?
- How do the dipoles of water contribute to each of the properties of water?
WATER FREEZING AT THE MOLECULAR LEVEL
- KEY CONCEPT: Frozen water is less dense than liquid water (ice has more open space).
THE HIGH SPECIFIC HEAT OF WATER
- KEY CONCEPT: Water resists increases in temperature, because heat is constantly absorbed by hydrogen bonds rather than the water molecules. Since organisms are mostly composed of water, this helps to regulate our internal temperatures and the temperature of the Earth.