SUPPL INSTR FOR CH 302 (GE 206E) - GE TA Mini Teach_Hector_Final

SUPPL INSTR FOR CH 302 (GE 206E) - GE TA Mini Teach_Hector_Final

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Unformatted text preview: Chemical Kinetics Hector Garcia Tuesday, April 14, 2009 C diamond C graphite ∆ G o = ? Is this reaction spontaneous? Spontaneous does not mean fast. It implies nothing about speed According to thermodynamics diamond should change spontaneously to graphite, but the process is too slow to be observed ∆ G o = - 3kJ To describe a chemical reaction, we need to know both the thermodynamics and the kinetics 2 NO 2(g) 2 NO (g) + O 2(g) (300 o C) t NO ∆ ∆ ] [ 2 t NO ∆ ∆ ] [- = dt NO d ] [ 2 dt NO d ] [ =- n NO k dt NO d ] [ ] [ 2 2 =- Rate law for irreversible reactions k = Proportionality constant or Rate constant n = Order of the reactant Assuming n = 1, and knowing k ) )( ( 2 2 ] [ ] [ t k o e NO NO- = n A k dt A d Rate ] [ ] [ =- = o A kt A ] ln[ ] ln[ +- = The Integral Method of Reaction Rate Analysis a A products Irreversible reactions, single reactant n = 0 Zero-order Rate Laws n = 1 First-order Rate Laws n = 2 Second-order Rate Laws o A kt A ] [ 1 ] [ 1 + = o A kt A ] [ ] [ +- = Example:...
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SUPPL INSTR FOR CH 302 (GE 206E) - GE TA Mini Teach_Hector_Final

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