Physical Chemistry 3: — Chemical Kinetics — - Christian-Albrechts ...

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Appendix G 293 G.2 Mittelwerte I Mittlere Energie ²: In der Thermodynamik interessieren Mittelwerte, z.B. die mittlere Energie . Für Größen, die durch eine Verteilungsfunktion beschrieben werden, erhält man den Mittelwert nach = P P = P P = P = X P = P mit = und P =1. Übergang zu einer kontinuierlichen Verteilungsfunktion liefert Z ∞ () (G.13) = 0 Z ∞ 0 () (G.14) Diese Ausdrücke vereinfachen sich, wenn () auf 1 normiert ist. I Allgemeine Berechnung der Mittelwerts y einer Größe y(²): X = X (G.15) bzw. Z ∞ ()() = 0 Z ∞ () (G.16) 0 I Example G.1: Berechnung der mittleren Energie für ein 3-Niveausystem: 0 =0 1 = 1 2 =2 1 0 =3 2 =2 2 =1 = X =6 (G.17) (G.18)
Appendix G 294 Ergebnis: = 1 X = X = X (G.19) = 1 6 (3 0 +2 1 +1 2 ) (G.20) = 1 6 (3 0 +2 1 +2 1 ) (G.21) = 1 6 (0 + 4 1) (G.22) = 4 6 1 (G.23) = 2 3 1 (G.24) ¤ I Mittlere Energie eines Moleküls: Bei Gültigkeit der Boltzmann-Verteilung kann die mittlere Energie eines Moleküle aus der molekularen Zustandssumme berechnet werden: = = 1 X = X P − P − = X (G.25) (G.26) y = P − = 2 = 2 = 2 = 2 X X 2 − |× 2 2 (G.27) (G.28) ¡ − |(durch differenzieren zeigen) (G.29) X − (G.30) = 2 ln (G.31) (G.32)
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Physical Chemistry 3: — Chemical
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iii 2.7 Temperature dependence of r
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v 7.1.2 Formal kinetic model 149 7.
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vii 12 Photochemical reactions 241
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ix Preface This scriptum contains l
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xi Disclaimer Use of this text is e
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xiii I Figure 2: Organisational mat
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xv I Figure 6: Recommended textbook
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1.2 Time scales for chemical reacti
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1.2 Time scales for chemical reacti
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1.3 Historical events 6 I Empirical
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1.4 References 8 2. Formal kinetics
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2.1 Definitions and conventions 10
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2.2 Kinetics of irreversible first-
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2.2 Kinetics of irreversible first-
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2.3 Kinetics of reversible first-or
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2.3 Kinetics of reversible first-or
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2.4 Kinetics of second-order reacti
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2.4 Kinetics of second-order reacti
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2.5 Kinetics of third-order reactio
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2.6 Kinetics of simple composite re
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2.7 Temperature dependence of rate
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3.1 Determination of the order of a
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3.2 Application of the steady-state
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3.2 Application of the steady-state
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3.4 Generalized first-order kinetic
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3.5 Numerical integration 58 I Surv
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3.5 Numerical integration 60 2 ord
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3.5 Numerical integration 62 3.5.5
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3.5 Numerical integration 64 , Func
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3.6 Oscillating reactions* 66 3.6 O
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3.6 Oscillating reactions* 68 • B
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3.6 Oscillating reactions* 70 (5) S
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3.6 Oscillating reactions* 72 I Fig
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3.6 Oscillating reactions* 74 [X]
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3.7 References 76 4. Experimental m
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4.3 The discharge flow (DF) techniq
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4.3 The discharge flow (DF) techniq
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4.4 Flash photolysis (FP) 82 4.4 Fl
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4.4 Flash photolysis (FP) 84 I Figu
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4.6 Stopped flow studies 86 4.6 Sto
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4.8 Relaxation methods 88 4.8 Relax
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4.9 Femtosecond spectroscopy 90 I F
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4.9 Femtosecond spectroscopy 92 I F
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4.10 References 94 5. Collision the
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5.1 Hardspherecollisiontheory 96
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5.1 Hardspherecollisiontheory 98 I
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5.1 Hard sphere collision theory 10
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5.2 Kinetic gas theory 102 I The 1D
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5.2 Kinetic gas theory 104 I Figure
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5.2 Kinetic gas theory 106 5.2.2 Th
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5.2 Kinetic gas theory 108 • Resu
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5.3 Transport processes in gases 11
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5.4 Advanced collision theory 116 W
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5.4 Advanced collision theory 118 I
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5.4 Advanced collision theory 120 5
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5.4 Advanced collision theory 126 a
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5.4 Advanced collision theory 130 (
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5.4 Advanced collision theory 136
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5.4 Advanced collision theory 138 6
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6.2 Polyatomic molecules 140 I Figu
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6.2 Polyatomic molecules 142 I Mode
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6.3 Trajectory Calculations 144 •
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6.3 Trajectory Calculations 146 7.
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7.1 Foundations of transition state
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7.2 Applications of transition stat
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7.3 Thermodynamic interpretation of
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7.4 Transition state spectroscopy 1
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8.1 Experimental observations 176 (
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8.2 Lindemann mechanism 178 8.2 Lin
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8.2 Lindemann mechanism 180 I Half-
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8.3 Generalized Lindemann-Hinshelwo
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8.4 The specific unimolecular react
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8.5 Collisional energy transfer* 20
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8.6 Recombination reactions 202 8.7
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9.1 Chain reactions and chain explo
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9.1 Chain reactions and chain explo
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9.2 Heat explosions 208 • positiv
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9.2 Heat explosions 210 (3) We can
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9.2 Heat explosions 212 9.2.3 Explo
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9.2 Heat explosions 214 10. Catalys
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10.1 Kinetics of enzyme catalyzed r
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10.2 Kinetics of heterogeneous reac
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11.1 Qualitative model of liquid ph
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11.2 Diffusion-controlled reactions
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11.2 Diffusion-controlled reactions
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11.3 Activation controlled reaction
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11.4 Electron transfer reactions (M
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11.5 Reactions of ions in solutions
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11.5 Reactions of ions in solutions
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Page 273 and 274: 14 Combustion chemistry* 258 15. As
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Page 277 and 278: Appendix B 262 Appendix A: Useful p
Page 279 and 280: Appendix B 264 The Marquardt-Levenb
Page 281 and 282: Appendix C 266 • Convolution of t
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Page 285 and 286: Appendix C 270 C.3 Application to p
Page 287 and 288: Appendix D 272 Final solutions for
Page 289 and 290: Appendix D 274 D.2 Special matrices
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Page 293 and 294: Appendix D 278 D.4 Coordinate trans
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Page 299 and 300: Appendix E 284 Secular equation: de
Page 301 and 302: Appendix E 286 Appendix E: Laplace
Page 303 and 304: Appendix F 288 Appendix F: The Gamm
Page 305 and 306: Appendix G 290 Appendix G: Ergebnis
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Page 313 and 314: Appendix G 298 G.4 Mikrokanonische
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Page 317 and 318: Appendix G 302 y = (G.7
Page 319 and 320: Appendix G 304 G.8 Zustandssumme f
Page 321 and 322: Appendix G 306 G.9 Zustandssumme f
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Physical Chemistry 3: — Chemical Kinetics — - Christian-Albrechts ...

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