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CHEM6A - Lecture 1

CHEM6A - Lecture 1 - -Properties of Matter-Seven base units...

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CHEM 6A Lecture #1 (9-30-08) - Schoredinger equation to describe the hydrogen atom - Office hours; thurs 2-3 & fri 10-11 - Readings: 1.4-1.9 - What is energy? - Work=Energy=F*d (F=ma)=m*a*d (mass is constant, a=g, constant, work Is change in distance/height) - Conservation of Energy - Total sum of energy is constant - Energy appears in many forms - “Heat” and work both transfer heat - NaClO3(s) (+heat, triangle on top of arrow) --> 2NaCl(s)+3O2(s) - C12H22O11[sugar](s)+3O2 --> 3CO2+H2O+9C (+heat) - Matter – It’s Elemental! Or is it? - Mixtures – optical microscopy to check properties, whether or not they are uniform - If the properties of a mixture are uniform, it is homogenous - If the properties are not uniform, it is heterogenous - Phases of Matter - Particles only stop moving at absolute zero, no energy to move
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Unformatted text preview: -Properties of Matter-Seven base units of SI (meter, kilogram, second, ampere, Kelvin, mole, candela [cd])-Kilogram is the only base unit that’s based on a real artifact (block of cesium in a vault in France)-Meter is measured by speed of light-How many milligrams of sodium sulfate are equivalent to 0.0562 kg of sodium sulfate?-Substance: Elements, Compounds-When/How did we gain insight into the microscopic world of atoms?-The Birth of Modern Chemistry-The Atomic Theory-#2 wrong – isotopes -What is an isotope?-When we talk about atoms of elements, the number of protons must be the same-Subatomic particles-24/12Mg (12 protons, bc bottom # is 12; neutral atom, so electron=proton=12; 24-12=12, neutron=12)...
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