Properties of Matter ELEMENT hydrogen molecule, H 2 ELEMENT oxygen molecule, O 2 MIXTURE a mixture of hydrogen and oxygen molecules CHEMICAL REACTION.

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Presentation transcript:

Properties of Matter

ELEMENT hydrogen molecule, H 2 ELEMENT oxygen molecule, O 2 MIXTURE a mixture of hydrogen and oxygen molecules CHEMICAL REACTION if molecules collide with enough force to break them into atoms, a can take place COMPOUND water, H 2 O

ELEMENT hydrogen molecule, H 2 ELEMENT oxygen molecule, O 2 MIXTURE a mixture of hydrogen and oxygen molecules CHEMICAL REACTION if molecules collide with enough force to break them into atoms, a can take place COMPOUND water, H 2 O

2 H 2 O2O2 O2O2 2 H 2 O E E Copyright © 2007 Pearson Benjamin Cummings. All rights reserved.

The Zeppelin LZ 129 Hindenburg catching fire on May 6, 1937 at Lakehurst Naval Air Station in New Jersey.

S.S. Hindenburg 35 people died when the Hindenburg exploded. May 1937 at Lakehurst, New Jersey German zeppelin luxury liner Exploded on maiden voyage Filled with hydrogen gas

Hydrogen is the most effective buoyant gas, but is it highly flammable. The disastrous fire in the Hindenburg, a hydrogen-filled dirigible, in 1937 led to the replacement of hydrogen by nonflammable helium.

Erosion Takes a Powder Treated Untreated Top soil runoff

Sodium Polyacrylate Absorbent Material –Absorbs 700x volume of water Magicians –Pour water in hat and it “disappears” Diapers Farmers –Anti-erosion powder Add to Soils –hold moisture between watering

Specific Heats of Some Substances Specific Heat Substance (cal/ g o C)(J/g o C) Water Alcohol Wood Aluminum Sand Iron Copper Silver Gold

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