A–S反应(Arias–Stella)

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• 对于化学反应A+B→F（主反应），B+F→S（副反应）为了提高选择性应采用下列哪种操作方式（）。

  A . A、间歇操作 B . B、半间歇操作：一次性加入A物质，B物质连续加入 C . C、连续操作 D . D、半间歇操作：一次性加入B物质，A物质连续加入

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• Arias-stella现象

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• 对于可逆反应（选项）A+B←→R+S，加入适宜的催化剂（）。

  A . 可以提高正反应速度 B . 可以使产物收率增加 C . 可以改变反应速度 D . 可以改变化学平衡

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• 对自催化反应A+P→P+S而言，必然存在最优反应时间，使反应的（）最大。

  A . A、转化率 B . B、反应速率 C . C、收率 D . D、选择性

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• 听力原文：M: Hello, everyone. We're talking about Stella Hampton, famous Hollywood actress. Before the break, we were talking about your life, Stella, before you became a big star.

  W: Yes... Oh, but do we have to？ M: Well, I think it's interesting. And I think our listeners will find it interesting, too. I mean, you didn't become a big star overnight. You struggled for many years. W: You can say that again. M: Tell us a little about it. W: Oh, yes. I think I must have worked twenty or thirty different jobs. M: Really？ W: Sure! I couldn't find work as an actress for many years, so I had to do something. You have to eat, right？ M: What kind of jobs did you have？ W: A little bit of everything: I worked as a waitress, in a department store, painting houses... I think I got fired from most of those stores. M: Oh, yeah？ Come on, tell us a few stories. W: This is so embarrassing... Well, I remember I worked for a big department store in the hats department. It was so boring. We never had any customers during the day, and that's when I worked. When I got sleepy, I used to lie down under the hat racks and take an occasional nap. M: What happened？ W: Well, one day I got caught by my boss. And I got fired on the spot. Then there was the time I decided to paint house. It turned out that I was allergic to the paint. And my body was so sore after working the first day that I could hardly get out of the bed the next day. I couldn't take the physical work. I got fired again. M: Any other war stories？ W: Well... you are not going to believe this, but I actually drove a taxi for a few days. I got hired as a cab driver. M: No! You？ W: Yes. I was desperate and thought I could make good tips. I needed the money at the time. Unfortunately, it didn't lust. M: Fired？ W: Yes. How did you guess？ On my third day, I hit a pole. No one was hurt in the accident —my passenger was fine — but it scared me to death. That was the end of my career as a driver. M: Well, Stella, thank you for sharing those details with us. It's a good thing you made it as an actress! After the commercial break, we'll talk more with Stella about her new movie that's being released in September. (20) A．When she was working in a department store. B．When she was working for a painting house. C．When she was working in a taxi company. D．When she was working as an actress in Hollywood.

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• 如果平行反应A→P（主)和A→S（副)均为一级不可逆反应，若E主＞E副，提高选择性Sp应（)（填升高/降低)温度。

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• 恒压下，某反应A(s)+B(g)====2C(g)为放热反应，则该反应( )。

  A．△U＞0，W＞0 B．△U＜0，W＜0 C．△U＞0，W＜0 D．△U＜0，W＞0

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• 已知反应A+B→P，（-rA)=kcAcB，反应过程体积变化忽略不计，25℃下反应速率常数为9.92×10-3m3/（kmol·s)物料A和B的

  已知反应A+B→P，(-r_A)=kc_Ac_B，反应过程体积变化忽略不计，25℃下反应速率常数为9.92×10^-3m³/(kmol·s)物料A和B的初始浓度分别为0.1和0.08kmol/m³，求在间歇反应器中限制反应物转化率达到95%时所需反应时间。

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• 在一个体积为300L反应器中，86℃等温下将浓度为3.2kmol/m3的反应物A分解， A→P+S 该反应为一级反应，86℃下k=0

  在一个体积为300L反应器中，86℃等温下将浓度为3.2kmol/m³的反应物A分解， A→P+S 该反应为一级反应，86℃下k=0.08s^-1。最终转化率为98.9%，试计算A的处理量。 (1)若反应器为间歇操作，且设辅助时间为15min； (2)若反应器为CSTR，将结果与(1)比较； (3)若A的浓度增加一倍，其他条件不变，结果如何？

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• Stella didn't expect anyone would send him a puppy as a Christmas present.

  A．Y B．N C．NG

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• 精液A／S在200以上时分解过程不会有明显的脱硅反应发生（）

  是 否

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