Here are some study ideas for Exam 3, over Chapters 9-12.
Be sure to look over the labs and ask yourself,
"What is a 20-point question that could be asked about this experiment?"

Chapter 9: Enthalpy Chapter 9 quiz
a. You should understand how enthalpy relates to bonding.
b. You should be able to calculate DELTA_Ho for a chemical equation using a table of standard enthalpies of formation.

Chapter 10: Free Energy Chapter 10 quiz
a. You should be able to produce and interpret simple graphs of G vs. T in terms of enthalpy and entropy of products and reactants of a reaction.
b. You should be able to predict what will happen at different temperatures based on a given graph of G vs. T.
c. You should be able to calculate the crossing point of curves on a graph of G vs. T based on knowing DELTA_Ho and DELTA_So for a reaction.
d. You should understand the relationship between the molar entropy of a gas and its partial pressure, and you should be able to calculate the equilibrium vapor pressure of a gas above its liquid given a temperature and values for DELTA_Hovaporization and DELTA_Sovaporization.

Chapter 11: The Equilibrium Constant Chapter 11 quiz
a. Given a chemical equation, you should be able to write the reaction quotient, Q, in terms of pressures and concentrations.
b. Given any three of DELTA_Ho, DELTA_So, T, and K, you should be able to get the fourth.
c. Given tabulated or graphed data relating to K at various temperatures, you should be able to at least DESCRIBE how you would determine the values of DELTA_Ho and DELTA_So for a chemical equation describing a chemical reaction.
d. Given any three of K1, K2, T1, and T2, you should be able to get the fourth.
e. Given a graph of G vs. T showing a system at equilibrium at some temperature, you should be able to predict what will happen when the system is perturbed (by changing concentrations, pressures, or temperature).

Chapter 12: Applications (and Experiment 6)
You should be able to discuss at least four of the many applications in this chapter or in this experiment in a way that shows you understand how free energy is involved, including a graph of G vs. T if that makes your explanation simpler.