C1403.2006.Week_Eleven

C1403.2006.Week_Eleven - Ethene (ethylene) C2H4 Ethene...

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Ethene (ethylene) C 2 H 4
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Ethene (ethylene) C 2 H 4 8 days 16 days control Tomato ripening experiments Avocado ripening experiments
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Ethene (ethylene) C 2 H 4
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Ethene (ethylene) C 2 H 4
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Ethyne (acetylene) C 2 H 2
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Ethyne (acetylene) C 2 H 2
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Acetylene A colorless gas at room temperature (bp=-84°C), acetylene is prepared from coke and lime in an electric furnace: 3 C(coke) + CaO(lime) CaC 2 (calcium carbide) + CO CaC 2 + 2 H 2 O HC CH + Ca(OH) 2 It can also be prepared directly from natural gas (methane): 2 CH 4 C 2 H 2 + 3H 2 HEATS OF COMBUSTION data suggest ethane, not acetylene, releases the greatest amount of energy, yet acetylene is the gas of choice for lamps and torches. WHY? C 2 H 6 = 373 kcal/mol C 2 H 4 = 337 kcal/mol C 2 H 2 = 317 kcal/mol HEATS OF HYDROGENATION: special case for resonance stabilization in benzene (C 6 H 6 ).
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Chemiluminescence fire fly glow worm Luciferin + ATP + oxygen Produces light from an excited state in the decay process of an intermediate peroxide
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Chemiluminescence Luciferin + ATP + oxygen Produces light from an excited state in the decay process of an intermediate peroxide
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Chemiluminescence Luciferin + ATP + oxygen Produces light from an excited state in the decay process of an intermediate peroxide
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Bonding Theories Molecular Orbital Theory There are orbitals in molecules that are equivalent to
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This note was uploaded on 04/16/2008 for the course CHEM 1403 taught by Professor Leornardfine during the Fall '07 term at Columbia.

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C1403.2006.Week_Eleven - Ethene (ethylene) C2H4 Ethene...

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