课程名称︰普通化学甲 课程性质︰必修 课程教师︰林万寅 开课学院：工学院 开课系所︰化工系 考试日期（年月日）︰2012/1/11 考试时限（分钟）：120min 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1.which if the following processes are spontaneous? 10% (A)expansion of a gas into vacuum (B)freezing of hot water at 0度C and 1atm (C)a rubber band is rapidly extended by a hanging weight (D)dissolution of solid NACL in its saturated aqueous solution (E)a glass shatters in the floor 2.predit the sign(>0,=0,<0)of delta S in each of the following processes 10% (A)adiabatic reversible expansion of a gas (B)freezing of hot water at 0度C and 1atm (C)2H(g)→H2(g) (D)Sio2(s)→Si(s)+O2(g) (E)mixing of two gases at the same T and P 3.A diathermic contanier 1 mol of Ar (assumed ideal) at 1.0atm is immersed in a heat bath of 25度C(fig.a)A mass m is placed on top of a moveable piston,exer ting a pressure of 5.0 atm.after the equilibrium is reached(fig.b),the volume of the container is fixed and then the temperature of the heat bath is raised to 75度C(fig.c)answer the following question(Cv==3R/2 for Ar,R=8.314JK-1MOL-1) (28%) 图A:在一个热水浴(25度C)中有一个重物m准备开始压缩状态为(1 atm 的Ar) 图B:Ar被压缩为5 atm,温度仍为25度C 图C:压缩的之後Ar体积不变,但是温度上升至75度C (A)find q,w,delta U,delta S,delta G for Ar in the process 图A→图B (B)find delta H,delta S,delta S(surrounding)for Ar in the process 图B→图C 4. (12%) (A)At very high temperature,all types of molecular motions can be actived and the heat capacity of a molecule reaches a maximum. give the translation,rotat ional,vibrational contribution to the heat capacity(Cp) of CO2 at a very high temperature (B)give the thermodynamic properties that are required to calculate the absolute entropy of gaseous CO2 5.anwer the following questions for azide ion(N3-)and(N3+) (A)draw the lewis structure of (N3-) and give the formal charge of each atom 5% (B)formulate the MO structure for the delocalized π bonds for(N3-) 5% (C)predict the shape of (N3-) and the hybridization of the central N atom 4% (D)find the bond order of (N3-) 2% (E)is (N3+) paramagnetic or diamagnetic? 2% (F)find the bond order of (N3+) 2% 6.write the structural formula for the following molecules (10%) (A)3-ethly-2,4-dimethylheptane (B)trans-3,4-dimethyl-3-hexane (C)5-bromo-3-methyl-2-hexaonl (D)3,4-dichloro-2-hexnone (E)ethyl butanoate 7.complete the following rections.The chemical formula of the reactants must be give in the chemical equations (10%) (A)toluene+Cl2(hv)→ (B)benzene+ethyl chloride(AlCl3)→ (C)propene+HBr→ (D)ethanol(加热,H2SO4)→(intermolecular dehydration) (E)acetic acid+dimethyl amine→ --

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