{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chpt_3_Water - Life on Earth Exists because of H2O 1 Cells...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Life on Earth Exists because of H 2 O 1. Cells are mostly water 70-95%. 2. 3/4 th of Earth’s surface is covered by water. 3. Water is a polar molecule: a.opposite ends of the molecule have opposite charges b.opposite charges attract the molecules to H-bond ( each H 2 O molecules can form H-bonds with at least 4 others) c.this accounts for the properties of water
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
4. Properties of Water: a. Cohesion: Hydrogen bonds hold individual water molecules together it acts as one substance. (attraction that water has for itself) b. Adhesion: Clinging of water to another substance (the attraction that water has for other molecules) c. Surface Tension: (Is due to cohesion ) it is a measure of the force necessary to stretch or break the surface of a liquid. d. Specific Heat: The amount of heat that must be absorbed or lost for 1g of that substance to change its temperature by 1 0 C. 1. Heat is a measure of the total kinetic energy in a system. 2. Temperature measures the intensity of heat due to the
Background image of page 2
average kinetic energy in molecules. a. Temperature is measured on the Celsius scale (Celsius = C) -H 2 O freezes at 0 0 C -H 2 O boils at 100 0 C b. A calorie is a measure of heat.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}