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Lec-09-Chap13-1-Complete

Lec-09-Chap13-1-Complete - Lec-09-Chap13-1-Complete Lec-09...

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Lec-09-Chap13-1-Complete 9/23/2011 Directionality of Chemical Reactions Entropy Changes. 3 rd Principle. Standard Molar Entropies. 2 nd Principle 1 Lec-09: Thermodynamics: Spontaneous Processes. Entropy and Free Energy Chapter 13 1 Room Assignments Solar ID Room 000000000 107757371 Javits 100 Main Floor 107757372 999999999 Javits 100 Balcony Dependence of the rate constant with temperature The Arrhenius Equation More energy is available to the reaction system as the temperature increases. E a is the activation energy (units of energy, kJ mol 1 ) R is the gas constant (kJ K 1 mol 1 ) T is the temperature (K) 2 frequency factor (same u rate nits constant as ) a k E RT A e k T This leads to a temperature dependence of the rate constant . Experimentally Arrhenius found:
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