[學科] 96年成大考古題

看板Chemistry作者shadowlin (我是球球的女朋友)時間15年前 (2009/06/25 07:06)推噓2(2推 0噓 13→)

留言15則, 8人參與討論串1/1

1. For which process is ΔS negative? (a)evaporation of 1mol of CCl4 (B)mixing 5ml ethanol with 25 ml water (c)compressing 1mol Ne constant temperature from 1.5 atm to 0.5 atm (d)raising the temperature of 100g Cu from 275K to 295K (E)grinding a large crystal of KCl to powder ΔS<0違反第二定律,不可能發生 (b)我覺得可以發生(我剛錯了) (c)好像不太可能?? 請大家幫我解惑了,謝謝!! 2. Whst reason is given for the stability of C-C ,N-N,and O-O bonds,compared to the instability of Si-Si ,P-P,and S-S bonds? (a)Their metallic character varies greatly (b)Large differences in their ionization energies (c)Large differences in their electronegativities (d)Large differences in their abilities to form strong pi bonds (a)(b)我覺得不太可能,因為是非金剩下(c) (d) 我就不太確定請大家幫我解惑了 3.Calculate the number of stages needed to change a mixture of CO2 and CO2 13 13 that is originally 0.10%(by moles) CO2 to a mixture that is 0.010% CO2 by 13 a gaseous diffusion process .(The mass of C is 13.003355 amu) (A)205 (B)120 (C)365 (D)620 (E)435 這一題還是不會ㄟ,一起放上來,請大家給我幾個點也好很謝謝大家了!!! -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 122.125.161.238

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blueseal

06/25 11:30, , 1^F

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blueseal

06/25 11:32, , 2^F

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keith780614

06/25 12:14, , 3^F

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