Re: [學科] 化學
※ 引述《FLYINGNIGHT (阿森)》之銘言：
: 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)
怪怪的，我記得的判斷方法跟你一樣
: 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
把一些冰塊放在你要喝的水的中，一會兒有些冰塊變成兩塊黏在一起，
變一大塊。
: 4.下列何者是零級反應:
: 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
a.零級反應速率r = k (constant) 不會變，跟反應物濃度沒有關係，
只有第一個跟反應物濃度沒有關係，只是一個分子自己在互變。
不過話是這樣說，實際狀況還蠻懷疑的XD
b.氧化跟反應物濃度有關係的可能性很高
: 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 不過不是很確定 我只知道d是錯的.. 感覺應該 b或c是答案..
entropy 有負的嗎??? 我記錯了嗎?
不過感覺這題好像是多選題的感覺 a c 的樣子
: 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 不過這題還是不會 答案看到是b
re-forming不是指催化劑的再生嗎???
: 7.Which of the fllowing are heteogeneous alloys?
不同相的合金，應該就C了吧
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