chemical that needs to be burned to supply a certain amount of energy.(Sec.6.4, 6.5)3. Know the functions that are state functions and explain what it means to be a state function.4. Understand and use Hess’s law to calculate enthalpy of a reaction.(Sec 6.6-6.9)5. Use specific heats, heats of fusion and heats of vaporization in a heating or cooling process.(Sec 11.6, 11.7 6.4 and6.5)6. Be able to do calculations involving the first law and the work done by expansion of a gas.(6.6)SUGGESTEDPROBLEMS: 6.37, 6.39, 6.41, 6.43, 6.51, 6.55, 6.59, 6.69, 6.75, 6.81, 6.83, 6.87 (a,c) and the problems in Experiment 3 from Chemistry 1A are a good review. Thermodynamics (Chapter 18) 1. Understand the concept of spontaneous and nonspontaneous process (18.2)2. Understand entropy and calculate S° for a reaction using a table of absolute entropies. (Sec 18.7)3. Predict if the change in entropy, S, for a reaction will have a positive or negative value.(Sec 18.3, 18.4, 18.7)4. Understand how the heat transfer to surroundings affects its entropy (18.5).5. Calculate G° for a reaction using the equation G°= H°–T S°. (Sec 18.6)6. Use G for a reaction to predict the spontaneity of that reaction. (Sec 18.9)7.Understand the relationship between equilibrium constant and G°(18.10)8. Understand the temperature dependence of equilibrium constant (18.10)5. Be able to predict and calculate how G for a reaction changes when you change concentrations or T (absolute temperature). (Sec 18.9) 6. Be able to convert between G°, K and (standard cell potential) given one of these three quantities, and
understand how the values of each of these quantities relate to the equilibrium position.(19.5) 7. Know how work, G and cell potential are related. (P868, P869) 8. Understand and be able to answer questions about the meaning of the three laws of thermodynamics. S UGGESTED P ROBLEMS : 18.1, 18.6, 18.10, 18.11, 18.17, 18.23, 18.27, 18.29, 18.35, 18.39, 18.45, 18.47, 18.51, 18.55, 18.61, 18.69, 18.73, 18.75, 18.83, 18.89, 18.103 Here are the formulas and constants that you need to memorize: F = 96,500 coulombs/mole of electrons Specific Heat of Water (liquid) = 4.184 J = 1 calorie E = q + w G°= H° – T S° G°= - RT lnK G = –nF E G = H – T S G = G°+ RT ln Q Hess’s Law or
CHEMISTRY 1B Additional Practice Problems: *Electrochemistry*
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