Properties of Water Packet 1 1 Biochemistry Water

Properties of Water Packet 1. 1 - Biochemistry

Water is Life. • Water is essential for life on Earth. • 70% of Earth's surface is covered by water.

Properties Of Water • Adhesion • Cohesion • High Specific Heat • Capillary Action • Surface Tension

Cohesion • Cohesion- action or property of like molecules sticking together, being mutually attractive.

Capillary Action – Accomplished through the nature of bonding Liquid fills spaces and moves in opposition of gravity. – Polar covalent and hydrogen bonding Capillary Action

Adhesion • Adhesion- dissimilar particles or surfaces to cling to one another and climb

Why Adhesion Occurs • Water forms covalent bonds between Oxygen and Hydrogen. (Sharing Electrons) • Oxygen is greedier than hydrogen and pulls or keeps the shared electrons closer to itself.

Charge of Water • Unequal sharing causes the ends of the molecule to acquire a partial charge. • The opposite charged ends can form small bonds.

Surface Tension • Measure of cohesion of water molecules at the surface of a body of water.

Solid, Liquid, Gas • Water is the only molecule on Earth in all three states of matter. • Liquid water is more dense than frozen water. • This is due to the shape the water molecule when Water as aof Solid. it freezes.

High Heat Capacity • Water can absorb large amounts of heat. • Effects climate and regulates environmental factors • Temperature- less fluctuations due to the slow rate at which water absorbs and releases heat Water’s Specific Heat: 4. 186 J/g(C) Iron Specific Heat: . 45 J/g(C)

Question • Which will get hotter faster, the pot or the water? • Why? • How do you know?

Gas • When water heats up, it evaporates allowing us to release heat from our bodies. (Cooling process)