21UNIVERSAL SOLVENT This is a nickname given to water. Water dissolves LOTS of things.Remember:SOLVENT = the thing doing the dissolvingSOLUTE = the thing that dissolves awayOther polar molecules can be dissolved by water.
22NON-POLAR SUBSTANCES Non-polar substances DO NOT dissolve in water. Can you think of some examples of non-polar substances?DURACELL
23Universal Solvent Why is water so good at dissolving things? Because water is a polar molecule and is shaped like a wedge, it is able to break up substances into smaller pieces (dissolve).
24COHESIONBecause water is a polar molecule, it is attracted to itself.Cohesion – is the attractive force between water molecules.OHOH
25COHESION Water molecules like to stick to each other. Rubbing alcohol doesn’t like to stick to itself as much as water.
26ADHESIONBecause water is a polar molecule, it is attracted to other substances.Adhesion – occurs when molecules of water are attracted to other substances.
27Adhesion is going on between the windshield and the water droplet.
29Water molecules like to stick to each other. COHESIONWater molecules like to stick to each other.ADHESIONWater molecules like to stick to other things.
30SPECIFIC HEATSpecific Heat = the amount of energy needed to increase the temperature of something 1 degree C.Water has a really HIGH specific heatThat means it takes a lot of energy for water to increase its temperature.This is because of the STRONG ATTRACTION between water molecules.It’s POLAR!