PROPERTIES OF WATER
By Micah Berry and Owen Lansing
FREEZING POINT
Temperature at which something goes from liquid to solid.
Water Freezes at 32* F and 0*C
COHESION AND ADHESION
Comparison
Cohesion is how molecules of the same substance stick to each other. Adhesion is how molecules stick to other substances. For example, cohesion is like water sticking to water and adhesion is like water sticking to your skin.
HIGH SPECIFIC HEAT
The amount of energy required to change a substance 1 degree in temperature.
The specific heat of water is 4.184 J/g.
POLARITY
When anything has contradicting tendencies. Example: Something has both a positive and negative end. When someone can be happy and then sad.
Polarity in water molecules is between the positive hydrogen atoms in water and the negative oxygen atoms in water. Even though they are bonded, they still have positive and negative ends. This attracts other water molecules to cohere.
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FOR YOUR NOTEBOOK
1. Adhesion - One substance sticks to a different substance
2. Cohesion - One substance sticks to the same substance
3. Solute - A substance that dissolves in a solvent
4. Solution - A mixture of substances that is homogeneous
5. Solvent - A substance that dissolves
6. Hydrogen Bond - Attraction between a slightly positive hydrogen atom and a slightly negative atom
7. Polar Molecule - One part slightly negative, one part slightly positive
8. Surface Tension - Cohesiveness of a liquid at it's surface
9. Capillary Action - Using adhesion to move liquid through small spaces
10. Specific Heat - Allows large bodies of water to maintain stable temperatures
11. Boiling Point - Temperature that a substance boils. Ex. Water's is 100C or 212F
12. Freezing Point - Temperature at which a substance changes from a liquid to a solid. Ex. Water's is 0C or 32F
13. Acidic - pH of less than 7, Excessive amounts of Hydrogen Ions (H+)
14. Basic - pH of more than 7, Excessive amounts of Hydroxide Ions (OH-)