CHEM 345.001 - Principles of Physical Chemistry 1 -
Fall 2003
11/14/03
COURSE CONTENT GUIDE: Keyed to Textbook Chapters
Physical Chemistry, David W. Ball, Cole/Brooks (2003), ISBN 0-534-26658-4
Chapter 1: Gases and the Zeroth Law of Thermodynamics (1.1-1.6)
- At-home review: SI units and conversions between them; pressure unit conversions (atm, Pa, torr); kelvin and centigrade scale temperature conversions; ideal gas law; Dalton's Law of Partial Pressures.
- Basic curve fitting, numerical integration and numerical differentiation: Worksheet #1
- Ideal gas law including written in terms of the molar mass and density of the gas.
- Relationships between Avogadro's number (NA), Boltzmann's constant (kB) and the ideal gas constant (R)
- P-V diagram of an ideal gas (non-condensing).
- Expressing the composition (mole fractions) of an ideal gas mixture in terms of partial pressures: xi = Pi/PT .
- The use of partial derivatives to obtain slopes of PV isotherms, PT isochors, TV isobars, etc for the ideal gas.
- P-V diagram of a (condensing) real gas and be able to identify: liquid region, gas region, two-phase region, critical point.
- The compression factor (Z) gas and how this factor can be used to describe the deviation of a real gas from ideal gas behavior.
- Equations of state: ideal gas, van der Waals, virial (expanded in P and in 1/V).
- The significance of the two parameters of the van der Waals equation of state.
- Solving the van der Waals equation for P, T or V
Chapter 2: The First Law of Thermodynamics (2.1-2.7;2.8-2.11)
- At-home review: Hess' Law and its application to chemical reactions
- Expansion work: given by dW = - PextdV; reversible expansion work given by dW = - PdV ; calculating isothermal expansion work.
- Numerical calculation of work: Worksheet #2.
- Reversible, isothermal expansion of an ideal gas.
- Operational definitions of constant pressure heat capacity (CP = dqP/dT) and constant volume heat capacity (CV = dqV/dT).
- Explanation of why CP = CV for liquids and solids but CP >> CV for gases.
- Empirical descriptions of the variation of the heat capacity of a substance with temperature.
- Calculation of the amount of heat required to change the temperature of a substance, given its heat capacity.
- The First Law stated in differential and in integral form:
dU = dq + dw
DU = q + w
- Definition of enthalpy H = U + PV and be able to use it to calculate DH.
- Enthalpy changes, internal energy changes and heat flow: dH = dqP and that dU = dqV.
- Formal definitions of constant pressure heat capacity and constant volume heat capacity: CP=(dH/dT)P and CV=(dU/dT)V
- Calculating enthalpy changes associated with heating a substance at constant pressure.
- Calculation of standard enthalpies of reaction (DHo) at 298K from tables of standard enthalpies of formation (DHfo) at 298 K.
- Analytical method for estimating standard enthalpies of reaction (DHo) at any temperature using temperature independent heat capacities
- Numerical method for determining DHo at any temperature using temperature dependent heat capacity data: Worksheet #3.
Chapter 3: The Second and Third Laws of Thermodynamics (3.1;3.4-3.5;3.7-3.8)
- Classical definition of entropy by: dS = dqrev/T.
- Calculating entropy changes of substances during isobaric heating from their heat capacity functions.
- Enthalpy changes accompanying phase transitions.
- Calculation of the standard entropy of reaction (DSo ) at 298K from tables of absolute entropies (So) at 298 K.
- Analytical method for estimating the standard entropy of reaction (DSo ) at any temperature from tables of absolute entropies (So) at 298 K and temperature independent heat capacities.
- Numerical method for calculating the standard entropy of reaction (DSo ) at any temperature using temperature dependent heat capacities: Worksheet #4.
- Entropy changes associated with the isothermal expansion of an ideal gas.
- Obtaining entropies of mixing of ideal gases.
Chapter 4: Free Energy and Chemical Potential (4.1-4.8)
- General criterion for reaction spontaneity.
- Definition the Gibbs free energy (G) and its relationship to non-expansion work.
- Second Law in terms of the Gibbs energy change applied to a constant T,P process.
- Using the Summary of Equations resulting from the Laws of Thermodynamics
- Change of the Gibbs energy of liquids, solids and gases with pressure.
- Using the temperature variation of the Gibbs free energy of reaction (DG) to estimate DS of reaction and DH of reaction.
- Calculation of the standard Gibbs free energy of reaction (DGo ) at 298K from tables of standard Gibbs free energies of oformation (DGfo) at 298 K.
- Analytical estimation of the standard Gibbs free energy of reaction (DGo ) at any temperature using temperature independent enthalpy of reactions (DH).
- Numerical determination of the standard Gibbs free energy of reaction (DGo ) at any temperature using temperature dependent heat capacities: Worksheet #4.
- Partial molar quantities: partial molar volume and partial molar Gibbs free energy ("chemical potential")
Chapter 5: Introduction to Chemical Equilibrium (5.1-5.3; 5.5)
- Equilibrium: thermal (DT=0), mechanical (DP=0) and chemical (Dm=0 and DG=0).
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- The general equlibrium constant for real systems: gases, solutes, solvents, pure liquids, pure solid
- Relationship between DG and the reaction quotient
- Relationship between DGo and the equlibrium constant
- Estimating changes in the equilibrium constant with temperature assuming a constant enthalpy of reaction.
Chapter 7: Equilibria in Multiple-Component Systems (7.1-7.7)
- Raoult's Law and its application to relating the composition of an ideal binary (non-electrolyte) solution to the composition of the vapor in equilibrium with the solution.
- Henry's Law and its application to relating the composition of a dilute binary (non-electrolyte) solution to the composition of the vapor in equilibrium with the solution.
- Real Solutions: deviations from Raoult's Law and from Henry's Law.
- Calculating activity coefficients from vapor pressure data.
- Writing the chemical potential for components of a non-electrolyte solution
- Estimating solubilities of solids in liquid solvents
- Colligative Properties: Boiling point elevation, freezing point depression, osmotic presure
Chapter 8: Electrochemistry and Ionic Solutions (8.3-8.7)
- Standard electrodes, half-reactions and standard electrode potentials
- Standard cell potentials, overall cell reactions, DGo and Keq for the cell reaction.
- Nernst equation: variation of the cell potential with composition.
- Non-standard cell potentials, overall cell reactions and DG for the cell reaction.
- Electrolyte dissociation in solution.
- Activities of ions in solution: empirical variation with ionic strength and the predictions of various theories.
Chapter 10: Introduction to Quantum Mechanics (10.1-10.12)
- Heisenberg Uncertainty Principle: position/momentum, time/energy.
- Basic assumptions of quantum mechanics.
- Normalizing the wave function.
- Use of the wave function and operators to obtain system properties.
- General use of the Schrödinger equation and its features.
- Results for a free particle in a one-dimensional box: wave functions, energies, transitions, zero point energy.
- Results for a free particle in a three-dimensional box:wave functions, energies, transitions, degeneracy.
- Quantum mechanical tunneling: finite potential energy barriers.
Chapter 11: Model Systems (11.1; 11.3-11.5;11.7)
- Diatomic vibrations as a harmonic oscillator: wave functions, energies, transitions, zero point energy, tunneling.
- Rotation as a free rigid rotor: wave functions, energies, transitions, zero point energy.
Chapter 14: Rotational and Vibrational Spectroscopy (14.4-14.6;14.8-14.12
- General features of spectroscopy: Bohr condition, line width, line intensity, line energy (frequency), selection rules, lifetimes of excited states, line width.
- Boltzmann population distributions.
- Requirements in order to observe an infrared, Raman, microwave absorption bands.
- Electron transitions in a linear conjugated hydrocarbon treated as free particles in a box
- The infrared spectrum of a diatomic molecule treated as a non-rotating harmonic oscillator.
- The microwave spectrum of a diatomic molecule treated as a rigid free rotor.
- Calculating the number of normal modes of vibration in a polyatomic species: Worksheet #5
Chapter 19: The Kinetic Theory of Gases (19.3-19.6)
- The Maxwell speed distribution.
- Most probable speed, mean speed, mean square speed, root-mean-square speed.
- Collision rates between particles.
- Collision rates with the wall.
- Effusion and diffusion.
Chapter 20: Kinetics (20.1-20.7;20.10-20.11)
- Definition of the reaction rate in terms of reactant or product appearance rates.
- The experimental rate law.
- The 1st and 2nd order reaction in one component: rate expressions; integrated rate laws for product and reactant; half-lives.
- Numerical estimations of reactant/product concentrations directly from the rate expressions: Worksheet #6.
- Elementary reactions: rate expression derived from its stoichiometry.
- Reaction mechanisms: collections of elementary reactions.
- Reversible unimolecular reaction: rate expression; integrated rate laws for product and reactant.
- Two consecutive irreversible unimolecular reactions: rate expression; integrated rate laws for product, reactant and intermediate.
- Approximations for predicting experimental rate laws: rate determining step; fast equilibrium followed by a rate determining step; steady state assumption.
- Transition state theory.