Properties of Water Properties of Water What is

Properties of Water

Properties of Water • What is the chemical formula for water? • 2 Hydrogen atoms and 1 Oxygen atom – H 2 O

Water • The most important molecule to living things. Why?

Water is a polar molecule • This results in a water molecule with a negative end a positive end.

Because water is polar it dissolves many substances. • Water is considered the Universal Solvent, meaning it can dissolve any polar substance.

Solubility Review • Solubility - the measure of how much solute can be dissolved by a solvent at a given temperature. • Example: Sugar dissolving in water. • Remember, the sugar dissolves faster in hot water than in cold water. • As the temperature increases, the solubility increases.

Because water is polar it has these properties: • Cohesion- water molecules stick together • Surface tension- inward pull of surface water molecules creating a smooth sheet • http: //www. youtube. com/watch? v=45 yabrnry Xk

Because water is polar it has these properties: • Adhesion - water molecules stick to other molecules • Capillary action - allows water to move UP and through materials

Specific Heat • Specific Heat - The amount of heat needed to increase the temperature by 1 degree Celsius. • Water has a HIGH Specific Heat! • It takes A LOT OF HEAT to raise the temperature of water.

Specific Heat Example • It’s a hot day! The sidewalk is hot, the sandy beach is hot. So, you decide to go to the beach. When you jump in the ocean, the water is surprisingly cool! • Why? ? ? Because it takes more heat to warm the water then the sidewalk, beach and air!

Water’s Specific Heat • Why does water have a HIGH specific heat? • It’s POLAR!!! (Of course!) • The molecules are SO attracted to each other that it takes A LOT of heat to break the molecules apart.