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ESSENTIALS OF PHYSICAL CHEMISTRY Don Shillady CRC Press Taylor & Francis Group Boca Raton CRC Press is an imprint Taylor Si Francis Croup, London New York of the an Informa business Contents Preface xiii Author xvii List of Constants xix Periodic Table of the Elements Introduction: Mathematics and Chapter 1 xxi Physics Review xxiii Ideal and Real Gas Behavior 1 Introduction to the "First Encounter with Physical Chemistry" Phenomenological Derivation of the Ideal Gas Equation Charles' (Jacques-Alexandre-Cesar Charles) Law Useful Units Molecular from Gas Density (the Dumas Bulb 11 13 Supercritical 18 Fluid Chromatography 19 Instrumentation 20 Supercritical Mobile Phase Sample SCF Separations Summary 21 Problems 23 References 24 Viscosity 21 22 of Laminar Flow 25 25 Measurement of 28 Viscosity Viscosity of Blood Staudinger's Rule for Polymer Summary 3 30 Molecular Weight 34 35 References 35 The Kinetic Molecular Theory of Gases 37 37 Kinetic Assumptions of the Theory of Gases Weighted Averaging: 4 31 Problems Introduction Chapter 10 Nonideal Gas Behavior Introduction Chapter Method) Dalton's Law of Partial Pressures Supercritical Fluid 2 1 4 8 Weight Fluids Chapter 1 A Very Important Concept 37 39 Summary 50 Problems 51 References 51 The First Law of Thermodynamics 53 Introduction 53 Historical Development of Thermodynamics Definitions First Law of 53 54 Thermodynamics 55 v vi Contents Isothermal Processes Enthalpy and Heat 57 59 Capacities Adiabatic Processes 61 Adiabatic Nozzle 64 Diesel 65 Expansion Spectroscopy Engine Compression Calorimetry and 67 Thermochemistry Hess's Law of Heat Summation Standard Heats of Formation at 71 298.15°K and 1 bar Pressure of Reaction Temperature Dependence Enthalpies Polynomial Curve Fitting Application to Afl°„ (T>298.15°K) Other Types of Thermochemistry Perspective Key Formulas and Equations 73 Problems 79 Testing, Grading, and 5 Thermodynamics Introduction 78 81 81 83 of Real Heat Efficiency Engines Entropy and Spontaneity Summary of the Second Law of Thermodynamics Eight Basic Equations of Thermodynamics 86 Third Law of 90 Entropy 85 Thermodynamics of Reactions Entropy Changes Trouton's 88 88 93 Rule/Observation Simple Summary Testing, Grading, 87 92 at T> 298.15°K Statistical Treatment of 6 78 Cycle Efficiency Carnot Chapter 78 81 Cycle/Engine Carnot 75 80 The Second and Third Laws of Carnot 74 79 Learning? References Chapter 72 94 Liquids and Gases 95 99 and Learning? 100 Problems 101 Bibliography 102 References 102 Gibbs' Free Energy and Equilibria Introduction 103 Temperature Dependence of Equilibrium Constants van't Hoff Equation Vapor Pressure of Liquids Phase Equilibria 106 How Ice Skates Work 113 Gibbs Phase Rule 113 Iodine 115 Triple Point (C/>-Cy) for Liquids and Solids Open Systems: Gibbs-Duhem Equation for Partial Molal Volumes Chemical Potential for Open Systems 103 106 108 112 117 119 123 Contents vii 125 Modeling Liquids Summary 128 Problems 129 Testing, Grading, Chapter 7 and 129 Learning? Bibliography 130 References 130 Basic Chemical Kinetics 133 Introduction 133 First-Order Reactions 133 Promethium: An Introduction Madame Curie and to Nuclear Chemistry Radioactivity 137 Radium 139 Second-Order Rate Processes: Second-Order Rate Processes: Arrhenius Activation The Classic A 8 -» B [A] [B] [A] ^ [B] = Energy —> 147 150 153 References 154 More Kinetics and Some Mechanisms 155 Introduction 155 Beyond Eyring Example Graphical-Analytical Method for A/f* and AS* Summary of Graphical Method Results at r=25°C Further Consideration of SN1 Solvolysis Chain Reactions and the Steady State Steady-State Example No. 1: H2 + Br2 -» 2HBr Steady-State Example No. 2: Thermal Cracking of Acetaldehyde Steady-State Example No. 3: The Lindemann Mechanism Enzyme to the Transition State Kinetics 155 159 161 163 164 165 165 167 168 169 Basic Michaelis-Menten Equation Hypothetical Enzyme Michaelis-Menten with Competitive Michaelis-Menten Summary Example: 171 A 172 Inhibitor Kinetics Conclusions 174 176 178 Problems 178 Testing, Grading, 9 139 Problems Arrhenius Chapter 139 145 C Consecutive First-Order Reaction the Atom Splitting Chapter 135 and Learning? 179 Bibliography 180 References 180 Basic 181 Spectroscopy Introduction 181 Planck's 181 Discovery Radio Waves Balmer's Integer 183 Formula Very Useful Formula Preliminary Summary of the 184 A 189 Bohr Atom 190 vjjj Contents Significance of the Bohr Quantum Number Orbital Screening X-Ray Emission Forensic/Analytical Use of Auger X-Rays X-Ray X-Ray 192 n 192 193 196 Fluorescence 198 Diffraction 199 Absorption Spectroscopy/Spectrophotometry Interpreting Electronic Spectra General Principles of Spectroscopy 202 Problems 210 Electronic Chapter Chapter 10 209 Bibliography 210 References 211 Early Experiments in Quantum Physics 213 Introduction 213 Stefan-Boltzmann Law: Relating Heat and Light—Part 1 Blackbody Radiation: Relating Heat and Light—Part H 213 Photoelectric Effect 221 De 225 Broglie Matter Waves 214 Davisson-Germer Experiment 226 Summary 230 Problems 231 References 232 11 The Schrodinger Wave Equation 233 Introduction Definition of Chapter 12 204 233 a Commutator 242 Postulates of Quantum Mechanics 243 Particle 244 on a Ring Comparison of PIB and POR Applications Additional Theorems in Quantum Mechanics 247 Summary 249 Problems 250 Study, Test, and Learn? 251 References 252 The 253 247 Quantized Harmonic Oscillator: Vibrational Spectroscopy Introduction 253 Harmonic Oscillator Details 255 Harmonic Oscillator Results 258 Reduced Mass Isotope Shift 262 in the Vibrational Fundamental Hermite Recursion Rule Infrared Dipole Selection 3iV- 6 or Raman Spectroscopy 264 265 Rule 265 3jV- 5 Vibrations? 267 271 Summary 274 Problems References Frequency 275 , 275 Contents Chapter '* 13 The Quantized Rigid Rotor and the Vib-Rotor 277 Introduction 277 Three-Dimensional Particle-in-a-Box 277 Rigid Rotor Key Step! 281 Rigid Rigid 279 Rotor Wave Functions 283 Rotor Results 285 Angular Wave Functions 285 Angular Momentum 286 Rotational Chapter 14 Spectrum of CO Fourier Transform Spectrometry FT-IR Imaging and Microscopy 289 Dipole Requirement Vib-Rotor Infrared Spectroscopy Bond Length of H-$C1 Summary 294 Problems 304 References 305 The Schrodinger Hydrogen 291 292 295 302 303 Atom 307 Introduction Strategy to 307 Solve the Problem Associated Laguerre 307 Polynomials 310 Interpretation Pictures of Angular Orbitals Powell Equivalent d-Orbitals 311 Unsold's Theorem 323 Aufbau Term 316 319 and the Scaled H Atom Principle Symbols and Spin Angular 323 Momentum 324 Hund's Rule \L, Sz) versus 325 \J, Jz) Coupling 326 Summary 328 Problems 329 References 329 Chapter 15 Quantum Thermodynamics 331 Introduction 331 (Energy) Partition Function Average Translation Energy in One Dimension Average Rotational Energy of a Diatomic Molecule Average Vibrational Energy High-Temperature Limit for Vibrational Heat Capacity Heat Capacity of a Polyatomic Species: Water Combining Partition Functions Statistical Formulas for Other Thermodynamic Functions 333 Statistical Formula for S(T) 340 Sakur-Tetrode Formula for Absolute Entropy of a 334 334 335 337 337 339 340 Gas 341 343 Summary Problems References 344 • 344 Contents x Chapter 16 Approximate Methods and Linear 345 Algebra 345 Introduction Simple 345 First-Order Perturbation Theory Principles of Perturbation 347 Theory Variation Method 348 Molecular Orbitals and the Secular Chemical Bonds of Chapter 350 Equation 352 Ethylene Elementary Linear Algebra 356 Unitary Similarity Diagonalization of a Square Hermitian Matrix Jacobi Algorithm for Diagonalization Using a Computer 359 Order Matters! 361 Summary 362 Problems 363 Testing, Grading, and Learning? Study, Test, and Learn? 363 References 366 365 17 Electronic Structure of Molecules 367 Introduction 367 Hartree-Fock-Roothan LCAO Calculations 367 Chemical Effects in Orbital 368 Many-Electron Screening Wave Functions 370 Determinantal Wave Functions for Many-Electron Systems 371 Roothaan's LCAO Hartree-Fock Equation Electron Exchange Energy 372 Practical 373 Implementation and Equations for Examples 2n Electrons 375 377 Gaussian Basis Sets 377 Moment of BH 392 Excited States of BH 392 Mesoionic Bond Orders 393 Summary 399 Problems 399 References 401 Point Group Theory and Electrospray Mass Spectrometry Introduction Basic Point Future 403 403 Group Theory 403 Calculation of Molecular Vibrations of Development Electrospray "Making Elephants Fly" Summary Chapter 374 SCF Iteration Dipole 18 370 Atomic Units The Hartree-Fock-Roothaan Chapter 361 410 Mass Spectrometry? 412 414 419 Problems 419 References 420 19 Essentials of Nuclear Magnetic Resonance Introduction Early NMR 423 423 Spectrometers 423 Contents xi NMR Spin Hamiltonian Application of 1D-NMR Nuclear Magnetic Resonance: Pulse Analysis Rotating Coordinate System Detection of Magnetic Fields 424 Forensic 427 Bloch Equations Complex Fourier Transform 434 2D-NMR COSY 438 430 432 433 438 Coherent Spectroscopy Operator COSY Analysis Using Anatomy of a 2D Experiment Product 439 Dr. Brown's Automated Software 440 443 Summary 447 Problems 447 References 447 Appendix A: Relation between Appendix B: The Hartree-Fock-Roothaan SCF Legendre and Associated Legendre Polynomials Equation 449 451 Appendix C: Gaussian Lobe Basis Integrals 457 Appendix D: Spin-Orbit Coupling in the H 459 Atom Index 465 UseofPCLOBE 475