Properties of Water has unique properties Polarity Cohesion

Properties of Water has unique properties Polarity Cohesion Adhesion Solubility High Surface Tension Density High Specific Heat High heat of Vaporization p. H

Properties of Water has unique properties Polarity Cohesion Adhesion Solubility High Surface Tension Density High Specific Heat High heat of Vaporization p. H

Properties of Water Polarity A water molecule is a “polar” molecule: slightly positive in one area and slightly negative in another area Water molecules are highly attracted to one another

Properties of Water Surface Tension Because of the polarity, water molecules are very attracted to each other, even more than it is attracted to air. Water forms a “skin” on the surface. There are two types of surface tension

Properties of Water Cohesion The attraction between water molecules. Water sticks to water

Properties of Water Adhesion The attraction between water molecules and other substances Water sticks to other things

p. H – is a measure of how acidic or basic something is 7 is neutral < 7 is acidic > 7 is basic

Properties of Water High Specific Heat - heat required to raise the temperature by 1 degree The higher the specific heat, the longer it takes to heat up a substance Higher S. H = more energy to heat up

Specific Heat plays a role in ecosystems

Properties of Water High Heat of Vaporization Heat of vaporization is the energy required to convert liquid water to a gas. The faster the liquid evaporates the lower the heat of vaporization. Faster evaporation = lower heat of vaporization