课程名称︰普通化学丙 课程性质︰必修 课程教师︰林英智 开课学院：工学院 开课系所︰机械系 考试日期（年月日）︰2011.05.12 考试时限（分钟）：100mins 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1. Use the table given below to calculate (a) the vapor pressure of CCl4 at 40 ºC. (b) the boiling point of CCl4 at the external pressure of 0.1 atm. 2. A concentration cell, shown below, is made of two AgNO solutions in different concentrations. The AgNO3 concentration of the solution in beaker A is 1.0M, the concentration in beaker B is 0.01M. What is the potential. If HCl was added into the beaker A until the concentration of [Cl￣] is 0.1M . Calculate the potential of the cell. Use the table given below if necessary. 3. Use the table given below to calculate the standard reduction potential of Fe3+(aq) + 3e￣ → Fe(s). Can Fe2+ undergo disproportionation reaction. Plot a Frost diagram for the oxidation of Fe → Fe2+ → Fe3+ 4. Use the table given below to calculate the Ksp(AgBr) 5. Use the table given below to calculate the equilibrium constant K, potential Eº and ΔG°o for the redox reaction: Fe2+(aq) + Cu(s) → Fe(s) + Cu2+(aq) 6. If a piece of iron with a weight of 1.00 kg takes an area of 4.90x10^-3 m2 What is the pressure exerting on this area from this piece of iron. 7. An ideal gas is expanded from V=0.5 L P=2.0 atm to V=1.0 L P=1.0 atm isothermally.(a) How much work (in Joule) the system has done to the surrounding if the process is carried out reversibly along the isothermal line. (b) If the process is carried out irreversibly in one step by quickly changing the pressure from 2.0 atm to 1.0 atm then the volume is increased to 1.0 L. Find the work. (c) If the process is carried out irreversibly in two steps by changing the pressure from 2.0 atm to 1.5 atm then to 1.0 atm. Find the work. 8. An ideal gas is expanded from V=10.0 L, P=10.0 atm, T=0ºC to give a final pressure P=2.0 atm. (a) Find the final volume and ΔE, if the process is carried out reversibly along the isothermal line. (b) Find the final temperature, volume and ΔE, if the process is carried out reversibly and adiabatically (c) Find the final temperature if the process is carried out irreversibly. 9. One mole of ideal gas is expanded from P=1.0x10^-2 atm, T=25ºC to give a final pressure P=1.0 x10￣3 atm. (a) Find ΔSsys, ΔSsurr and ΔSuniv, if the process is carried out reversibly along the isothermal line. (b) Find ΔSsys, ΔSsurr and ΔSuniv, if the process is carried out irreversibly. 10. In a body-centered cubic system of atom A, What is the percentage of the total space filled by atoms A. Useful data: ΔHfo(CCl4(l)) = -135.4 kJ/mol, ΔHfo(CCl4(g)) = -102.9 kJ/mol, So(CCl4(l)) = 216.4 J/(K mol),So(CCl4(g)) = 309.7 J/(K mol). Fe2+(aq) + 2e￣ → Fe(s) Eº = –0.44V Fe3+(aq) + e￣ → Fe2+(aq) Eº = 0.77V Cu2+(aq) + 2e￣ → Cu(s) Eº = 0.33V Ag+(aq) + e￣ → Ag(s) Eº = 0.80V AgBr(s) + e￣ → Ag(s) + Br￣ Eº = 0.10V Ksp(AgCl) = 1.8 x 10^-10 Part II (15 Multiple choice, 2% each): 1. Consider a sample containing 2.00 mol of a mono-atomic ideal gas that under goes the following change: PA = 10.0 atm → PB = 10.0 atm VA = 10.0 L → VB = 5.0L Assume that the external pressure is constant and equals the final pressure of the gas for that step. Calculate w from state A to state B. (A) 0 kJ (B) -5.1 kJ (C) -35 kJ (D) 5.1 kJ. 2. The specific heat capacity of Aluminum is 0.900 J°C-1 g-1. How much energy is needed to raise the temperature of an 8.50 x 10^2 g block of Aluminum from 22.8°C to 94.6 °C. (A) -54.9 kJ (B) 54.9 kJ (C)24.3 kJ (D) -24.3 kJ. 3. Which of the following involve a decrease in the entropy of the system under consideration? (A)evaporation of a liquid (B) freezing (C) mixing (D) diffusion. 4. The autoionization of water at 25°C, H2O(l) → H+(aq) + OH-(aq) , has the equilibrium constant 1.00 x 10^-14 Calculate ΔG°for this process at 25°C. (A) -787.7 J/mol (B) 79.9 kJ/mol (C) 0 (D) 45 kJ/mol. 5. In a closed system, which of the following equations is not ture? (A) dw = PdV (w is positive when the work is done on the system) (B) ΔE = q + w (C) dqp = CpdT (D) ΔH = qv 6. For each of the following processes, state which of the ΔE and ΔH are equal to zero: a. Adiabatic reversible expansion of a non-ideal gas. b. Vaporization of liquid water at 100°C and 1 atm pressure. c. Isothermal reversible expansion of an ideal gas. (A) a (B) b (C) c (D) all. 7. Copper can reduce silver ion to metallic silver, a reaction that could in principle be used in a battery.Which of following one is false? (A) Cu(s) →Cu2+(aq) + 2e-; the copper half-reaction is oxidation. (B) Ag+(aq) + e- → Ag(s);the silver half-reaction is reduction. (C) The copper half-reaction occurs in the cathode compartment; the silver half-reaction occurs in the anode compartment. (D) The copper half-reaction occurs in the anode compartment; the silver half-reaction occurs in the cathode compartment. 8. Which of following one cannot occur at standard condition? (A) 2H+ + Cu → H2 + Cu2+; E°cell= -0.34V (B) 2H+ + Mg → H2 + Mg2+; E°cell= 2.37V (C) Fe3+ + 2I- → Fe2+ + I2 ;E°cell= 0.23V (D) Fe2+ + Vo2+ + 2H+ → Fe3+ + Vo2+ + H2O; E°cell= 0.23V 9. Which of the following statements is false? (A) A reducing agent gets oxidized as it reacts. (B) If something is reduced, it is formally losing electrons. (C) Oxidizing agents can convert CO into CO2 (D) If there are no changes in the oxidation state of the reactants or products of a particular reaction, that reaction is not a redox reaction. 10. Which of the following processes is likely to have the most positive entropy change per mole under standard condition? (A) Freezing of water to ice (B) A sample of helium gas compressed to half its original volume at constant temperature. (C) The vaporization of liquid trichloromcthane. (D) The cooling of graphite from 77K to 4.2K (E) The transformation of graphite to diamond at room temperature. 11. Which of the following expressions is correct? (A) ΔG° = ΔG + RTlnQ (B) ΔG = ΔG°+ RTlnQ (C) ΔG° =- RTlnQ when Q ≠K (D) ΔG° = AG + RTlnK 12. About the first law of thermodynamics, choose the correct statement. (A) The total energy of an isolated system is constant. (B) The internal energy of an isolated system is constant. (C) The total energy of a closed system is constant. (D) Work and heat can be completely interconverted by a cyclic process. (E) All above is correct. 13. According to the second law of thermodynamics, which of the following quantities represents the changes in a state function? (A) Tqrev (B) wrev (C) qrev (D) qrev/T (E) Twrev 14. For the vaporization process benzene (l) →benzene(g) at 1 atm, ΔH°vap = 30.5 KJ/mol and ΔS°vap (A) -80°C (B) 0°C (C) 80°C (D) 353°C = 86.4 J/mol K. Assuming these values are independent of T, What is the normal boiling point of benzene? 15. The electronic configuration for Zn is (1s)2(2s,2p)8(3s,3p)8(3d)10(4s)2 (A) The nuclear charge Z = 28. (B) Considering the shielding effect of the valence (4s) electron in the atom Zn, Z. Which of the following is correct? * = 4.35 (C) Considering the shielding effect of a 3d electron in the atom Zn, Z*= 4.35 (D) All above is correct. --

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