Review Sheet for Exam 2 in Chem 3620
Only topics that we have covered in class and I have assigned homework over will be covered
on the exam. Although certainly not an all inclusive list, among the things you should be able to
understand, explain, or do are:
Photochemistry
List and explain the different layers of the atmosphere. Explain the different types of UV light
and the protection given to us by the ozone layer.
Define and use the Stark-Einstein Law to solve photochemistry problems.
Know the definitions of the terms on the handout sheet. Some of these include: transition
state and activated complex, kinetic salt effect.
The Velocity Distribution of Gases
Explain, sketch, and use the Maxwell velocity distribution function of gases to calculate the
fraction of particles in a particular range of velocities.
Derive expressions for the mean, most probable, and root mean square speeds of gases. Use
these equations to calculate values.
Derive the expression for the collision frequency of a gas molecule. From the expression find
the mean free path. Work problems with these equations.
Transport Properties
List the 3 major transport properties and define with a derivative equation. Know all units.
Define flux and gradient. Explain terms such as Fourier’s Law of Heat Conduction, Fick’s
First Law of Diffusion, Newton’s Law of Viscous Flow, Newtonian and non Newtonian
fluids, dilatant and thixotropic.
Do calculations as in the homework with transport equations.
Explain the difference between liquid and gas viscosity temperature dependence. Explain the
main ideas behind the equation for the temperature dependence of liquid viscosity. Know
the main ideas behind the derivation of the equation for gas viscosity.
Electrochemistry
Understand the basic principles of electrochemistry studied in general chemistry. This
includes oxidation and reduction, balancing redox equations from half cells, calculating
the E˚ of a cell from half cell potentials, and working problems with the Nernst equation.
Know the differences and similarities between galvanic cells and electrolysis. Know
general equations of use in batteries. Be able to predict the electrode products of the
electrolysis of aqueous solutions.
Be able to derive the Nernst equation starting with the definition of the Gibbs Free Energy.
Be able to calculate ΔG from the cell potential.
Use the Nernst equation to solve problems like the solubility of a slightly soluble salt.
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