CHE113 For Chemistry Rev S'12

CHE113 For Chemistry Rev S'12 - Chem 113, Prof. J.T....

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Unformatted text preview: Chem 113, Prof. J.T. Spencer 1 1 Spectroscopy and Spectrometry Spectroscopy and Spectrometry Forensic Science Forensic Science Copyright © James T. Spencer 2003-2006 All Rights Reserved Chapters 5 and 6 Chem 113, Prof. J.T. Spencer 2 2 Chemical Analysis What is this stuff? Chem 113, Prof. J.T. Spencer 3 3 Macroscopic Macroscopic Microscopic Microscopic Substances Atomic theory Mixtures Physical Properties and Changes • Science: Atomic Theory Science: Atomic Theory – from a fundamental understanding of the macroscopic behavior of substances comes an understanding the microscopic behavior of atoms and molecules (Baseball rules from Baseball Game?) Atoms, Molecules and Ions Atoms, Molecules and Ions Question: Can matter be infinitely divided? Most Greek Philosophers - Yes Democritus (460 BC) and John Dalton (1800s) - No (“atomos”means indivisible”) Chem 113, Prof. J.T. Spencer 4 4 Antoine Lavoisier Antoine Lavoisier Antoine Lavoisier Antoine Lavoisier was born in was born in Paris, and although Lavoisier's Paris, and although Lavoisier's father wanted him to be a father wanted him to be a lawyer, Lavoisier was lawyer, Lavoisier was fascinated by science. From the fascinated by science. From the beginning of his scientific beginning of his scientific career, Lavoisier recognized the career, Lavoisier recognized the importance of accurate importance of accurate measurements. He wrote the measurements. He wrote the first modern chemistry first modern chemistry (1789) (1789) textbook so that it is not surprising that Lavoisier is often called the textbook so that it is not surprising that Lavoisier is often called the father of modern chemistry. To help support his scientific work, father of modern chemistry. To help support his scientific work, Lavoisier invested in a private tax-collecting firm and married the Lavoisier invested in a private tax-collecting firm and married the daughter of one of the company executives. Guillotined for his tax daughter of one of the company executives. Guillotined for his tax work in 1794. work in 1794. Chem 113, Prof. J.T. Spencer 5 5 Matter and Mass Matter and Mass Background - Stoichiometry Background - Stoichiometry 2H 2 + O 2 2 H 2 O reactants products • Antoine Lavoisier (1734 - 1794) Antoine Lavoisier (1734 - 1794) – Law of Conservation of Mass Law of Conservation of Mass - atoms are neither created nor destroyed in chemical reactions – total number of atoms = total number of atoms after reaction before reaction – Stoichiometry Stoichiometry - quantitative study of chemical formulas and reactions (Greek; “stoichion”= element, “metron” = measure) • Chemical Equations Chemical Equations - used to describe chemical reactions in - used to describe chemical reactions in an accurate and convenient fashion an accurate and convenient fashion Chem 113, Prof. J.T. Spencer Chem 113, Prof....
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This note was uploaded on 03/30/2012 for the course CHE 113 taught by Professor Spencer during the Spring '08 term at Syracuse.

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CHE113 For Chemistry Rev S'12 - Chem 113, Prof. J.T....

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