课程名称︰普通化学丙 General Chemistry(C) 课程性质︰必修 课程教师︰郑淑芬 开课学院：医学院 开课系所︰药学系 考试日期（年月日）︰2010/10/22 考试时限（分钟）：120分钟 是否需发放奖励金：是!谢谢~! （如未明确表示，则不予发放） 1. Name the following compounds: (15%) (a) TiF4 (b) Al(OH)3 (c) CuSO4˙5H2O (d) N2O5 (e) KHCO3 (f) CH3CH=CHC2H5 2. Explain the following terms and give one example of them: (15%) (a) shielding effect (b) Schrodinger equation (c) diagonal relationship (d) inert-pair effect (e) Hund's rule 3.In a hydrogen atom, the 1s subshell is at an erengy of -1.31 * 10^3 KJ/mol, whereas in a helium atom it is at -2.37 * 10^3 KJ/mol. (a) Explain why the level is not the same in two cases. (2%) (b) Bohr's equation is written as En = -BZ^2/n^2. Calculate the effective nuclear charge (Zeff) for an electron in 1s-orbital of He. (4%) 4. (a) When an electron is accelerated through 75.5 V , what is the characteristic wavelength of this electron? (b) How much voltage is needed in order to accelerate an α-particle (He 2+), to the same wavelength? (4%) 5. It requires 186 KJ/mol to eject electrons from sodinm metal. (a) What is the minimum frequency of light necessary to emit electrons from sodium via the photoelectric effect? (3%) (b) If sodium is irradiated with light of 330 nm, what is the maximum velocity of the emitted electron? (3%) 6. What is the maximum of electrons that can have the following quantum numbers: (5%) (a) n=3, l=1 (b) n=4, l=3, ml=2 (c) n=2, l=2, ml=-1 (d) n=3, l=2, ml=2 (e) n=5, l=0, ml=-1, ms=1/2 7. (i) Name the following elements, show (ii) the electron configuration, and give (iii) the four quantum numbers in the form of (n, l, ml, ms) for the electron in the highest occupied orbital of each of them. (16%) (a) Cl (b) Ti3+ (c) Al (d) Ag+ 8. Predict the number of the radial nodes, and the angular nodal surfaces of the following orbitals: (8%) (a) 3p (b) 3d (c) 4s (d) 4f 9.Find the r values where the nodes appear in the Radial wavefunctions of 3s, 3p and 3d (10%) 10. Estimate the standard enthalpy of the following reactions. (10%) (a) H2C=CH2 + H2 → CH3-CH3 (b) NO + 1/2 NO2 → NO2 (c) standard enthalpy of formation of HNO2. Table of Bond enthalpies, KT/mol ------------------------------------------------------------------------------ Bond Bond enthalpy || Bond Bond enthalpy H-H 436 || C-C 348 O=O 496 || C=C 612 N≡N 944 || N-N 163 C-H 412 || N=N 409 N-H 388 || N-O 210 O-H 463 || N=O 630 ------------------------------------------------------------------------------ 11. (a) Write all the possible Lewis structures for (i) cyanate ion (O-C-N)- and (ii) fulminate ion (O-N-C)-. Indicate which of these Lewis structures is the most important for each ion, based on the formal charges. (b)The fulminate ion is unstable, and its salts are friction-sensitive explosives. Give possible explanation based on the Lewis structure. (10%) 12. Show the Born-Haber cycle and complete the following table (all values are in kilojoules per mole). (10%) ----------------------------------------------------------------------------- Compound ΔHf 1st IE 2nd IE ΔHf 1st EA 2nd EA ΔH(lattice) ΔHf (MX) (M,g) (M) (M) (X,g) (X) (X) (MX) (MX,s) ----------------------------------------------------------------------------- NaCl 108 494 2185 122 349 -85 787 (A) ------------------------------------------------------------------------------ CaO 368 654 1352 249 141 26 (B) -635 ------------------------------------------------------------------------------ Useful informations: Avogadro's number, N= 6.022 * 10^23 mol^(-1) Planck's constant, h= 6.626 * 10^(-34) J-s Mass of an electron, me= 9.109 * 10^(-31) kg Charge of an electron, e= 1.602 * 10^(-19) C 1 C.V = 1 J Speed of light, c= 2.9979 * 10^8 m s^(-1) Atomic mass, H= 1.008; He= 4.003; O= 16.00; Na= 22.99 --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 140.112.4.191 ※ 编辑: coolboy663 来自: 140.112.4.191 (10/22 15:48) ※ 编辑: coolboy663 来自: 140.112.4.191 (10/22 15:48)