general chemistry mrs rose marie capanema. what is chemistry ?
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General Chemistry
• Mrs Rose Marie Capanema
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What is Chemistry ?
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• Chemistry is the study of matter ; their properties, structure, and the changes they undergo.
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caffeine
Caffeine exhibits a number of biological effects resulting from its diuretic and stimulant properties.
Research has shown that some sensitive individuals experience side effects such as insomnia, headaches, irritability and nervousness.
C8H10N4O2
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Fools Gold & Aspirin
• Pyrite• Chemical Formula: FeS2
• Aspirin
• Structural Formula:
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What is matter ?
• Anything that has mass and occupies space.
• What are the three main physical states of matter? (KE and PE)
http://www.harcourtschool.com/activity/states_of_matter/
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Matter Map
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Physical X Chemical Change
Physical changes are those changes that do not result in the production of a new substance.
If you melt a block of ice, you still have H2O at the end of the change.
If you break a bottle, you still have glass. Painting a piece of wood will not make it stop being wood.
Common examples :melting, freezing, condensing, breaking, crushing, cutting, and bending.
Chemical changes, or chemical reactions, are changes that result in the production of another substance.
When you burn a log in a fireplace, you are carrying out a chemical reaction that releases carbon.
When you light your Bunsen burner in lab, you are carrying out a chemical reaction that produces water and carbon dioxide.
Common examples :digestion, respiration, photosynthesis, burning, and decomposition.
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Definitions:• http://www.fordhamprep.org/gcurran/sho/sho/lessons/lesson14.htm• Matter
Anything with mass and volume.
• Substance Matter with constant composition
• MixtureMatter with variable composition
• ElementSubstance made up of only one type of atom
• CompoundTwo or more elements that are chemically combined
• Heterogeneous MixtureMixtures that are made up of more than one phase
• Homogeneous MixturesAlso called solutions. Mixtures that are made up of only one phase
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DemoMagnesium is one of the most important component of fireworks.
http://www.gwinnett.k12.ga.us/LilburnES/PromoteGA/entertainment/fireworks_elements.html
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Alchemy• Alchemists searched for a way to transform
impure elements such as lead into pure gold.• http://www.alshindagah.com/julaug2005/gold.html
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• Is it possible to change copper into silver and then into gold?
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The copper face shows how the statue would look like if the
copper was not oxidized.
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http://www.fordhamprep.org/gcurran/sho/sho/lessons/lesson15.htm