课程名称︰普通化学甲(下) 课程性质︰物理系大一必带 课程教师︰陆骏逸 开课学院：理学院 开课系所︰物理系 考试日期（年月日）︰99/06/23 考试时限（分钟）：120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.(15 pts)You can burn the fuel in the heat engine to export work. Alternatively, you can use the electrochemistry fuel cells to produce the work. Which method has the higher theoretical efficiency ? Explain. 2.(10 pts)How do you separate the Al3+ ion and Fe3+ in an aqueous solution ? 3.(10 pts)Predict the relative magnitudes of the pKa's for I(OH) , IO2(OH) , IO(OH)5 . 4.(15 pts)Estimate the number of collisions per second between the N2 molecules in this room at 300K .(diameter of N2 is 3*10^-10 m) (kB=1.38*10^-23 J/K) 5.(15 pts)The suspension rods have the isotropic-nematic transition. Why is that the nematic phase appears at the high density an not rhe other way round? 6.(15 pts)To help the globular (spherical) protein to form crystal, one may add the non-absorbing polymer to produce the depletion attractions between the proteins. How do you control the strength of the attraction? How do you control the range of the attraction? 7.(20 pts)The enzyme kinetics often encounter the reaction mechanism: E + S ＝ ES ("＝"表示正逆反应) ES ＝ E + P Use the steady state approximation on the complex ES to obtain the the reaction rate equation (the Michaelis-Menten equation). 8.(20 pts)The older NMR machines use the continuous wave method to measure the spectrum, whereas the recent NMR machines use the pulse method to get the spectrum. Briefly describe the two methods. Explain that how do you get the signals, and what is the relation between the measured signals and the spectrum. --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 61.216.1.37