课程名称︰普通化学甲下 课程性质︰必修 课程教师︰林万寅 开课学院： 开课系所︰ 考试日期（年月日）︰2012/6/20 考试时限（分钟）：110分钟 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1.benzene cab be produced from hexane in the reversible reaction C6H14→C6H6 +4 H2.Kp for the reaction varies with T according to the following equation: ln Kp=54.0-32100/T.Startin with 1.00 atm of pure C6H14(g) at certain temperature,the total pressure is 1.80 atm after the equilibrium is established. Answer teh following questions. (A)find the partial pressures of all gases (B)find Kp and T of the reaction (C)find △H AND △S of the reaction (D)how T and P affect the extent of decomposition of C6H14(g) 2.The cell Pb|PbSO4|NaSO4(0.500M)||NaCl(0.500M)|AgCl|Ag develops a poetential of 0.546 V at 25'C Answer the following questions (E Pb2+→Pb=-0.126V E AgCl→Ag +Cl- =0.222V (A)identify the oxidizing agent and the reducing agent (B)write the balanced cell reaction (C)find the Ksp of PbSO4 (D)find the equilibrium constant for the cell reaction (E)what is the effect on the cell potential by adding (i) 0.100M Pb2+ to the anodic solution or (ii) equal amount of water to both electrolytic solutions? 3.The mechanism for the decomposition of NO2Cl is given below: k1 k2 NO2Cl→NO2+Cl NO2Cl+Cl→NO2+Cl2 ← k-1 (A)write the balanced chemical reaction (B)using steady-state approximation to deduce the rate law of the reaction (C)show that the initial rate is first order with respect to [NO2Cl] (D)deduce the rate law by using fast equilibrium for the first step (E)under what condition can both approaches give the same rate law? 4.nickel has an fcc structure with a density of 8.90g.cm-3(Ni=58.7) (A)find the edge length of the unit cell (B)find the atomic radius of nickel (C)find the radius of the largest atom that could fit into the holes of a nickel lattice.(hint:tetrahedral holes) 5.Talc,Mg3SiO10(OH)2,reacts with forsterite,Mg2SiO4,to form enstatite(MgSiO3) and water vapor (A)write the balanced chemical reaction (B)predict the signs of △S for this reaction (C)predict the structures of talc and enstatite(choose from:disilicate, cyclosilicate,shigle chain, double chain, sheet, or network) 6.the base sequences(codons) in mRNA that encode certain aino acids are: Met:AUG Trp:UGG His:CAU,CAC Ala:GCU,GCC,GCA,GCG (A)give the number of DNA sequences that can code for the peptide Trp-Ala- His-His? (B)give the sequences of mRNA and peptide produced from the DNA sequence TACCGTGTACGA (C)give the names of the three parts of a nucleotide found in DNA 7.answer the following questions (A)give the structure of Nylon6 (B)which form of PE has more branching:LDPE or HDPE (C)draw a schematic structure of a reverse micelle? (D)indicate the linkage(glycoside bond) in lactose(structure is shown below) how many chiral(asymmetric) carbons are there in a lactose molecule? --

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