1.Arrange molecular the following substances(1 mole each) in order of increasing entropy at 25度C: a.Ne(g) b.SO2(g) c.Na(s) d.NaCl(s) e.H2(g) 之前有看到 先比状态 气>液>固 再比原子数目 这样应该为: b>e>a>d>c 但却看到答案给:e>a>b>c>d 是答案错了吗?? 2.A student placed a few ice cubes in a drinking water. A few minutes later she noticed that some of the ice cubes were fused together. Explain 这题看得懂题目... 但是不知道怎麽解释 知道的人能否解释一下~ 3.The excited melecules decay through the following parallel mechanism : S1→(kf) S0+hv (fluorescence) S1→(kisc) T1 (intersystem crossing) S1→(kic) S0 (internal conversion) the fluorescence quantum yield §f(这应该是一个很奇怪的符号 圈圈里面有一条线)is 答案: kf/(kf+kisc+kic) 这题知道是平行反应，但是不知道为什麽，就是导不出来.... 4.下列何者是零级反应: a. thermal isomerization of cis-stilbene to trans-stilbene b. enzyme oxidation of glucose to gluconic acid c. decay of radioactivity of 60Co d. decay of triplet excited C60 to ground state e. none of the above 答案是a. 有问过人只知道，因为cd 是decay 所以是一级反应 但是我也不知道这为什麽? 但ab不知道..... 5.the standard free enery of formation of CS2(l) is 65.27 kj/mol at 298K. this neabs that at 298K. a.CS2(l) will not spontaneously from C(s)+2S(s) b.CS2(l) is thermodynamically unstable c.CS2(l) is thermodynamically stable d.No catalyst can be found to decompose CS2(l) into its elements e.CS2(l) has negative entropy 答案是E 不过不是很确定 我只知道d是错的.. 感觉应该 b或c是答案.. 6.Hydrogen can be made from fossil fuels in as series of two catalyzed reactions.One of these reactions,the re-forming reaction,is a.Zn+2HCl→ZnCl2+H2 b.CH4+H2O→CO+3H2 c.Cu(s)+2H+→Cu2+ +H2 d.CH3OH→2H2+CO 有去查re-forming 很像是再生 不过这题还是不会 答案看到是b 7.Which of the fllowing are heteogeneous alloys? a.tin-lead solder and bronze b.bronze c.mercury amalgam and tin lead solder d.coinage cupronickel 这题不知道答案...网路查也不太清楚 上面的答案是学长姐写的 所以不太知道是否很正确 这是我写题目累积的问题 所以蛮多的... 麻烦各位解答了 感谢~! (PS. 有没有办法把考古题的照片档案 变成可以复制的阿...XD) --

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