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本课程起止时间为:2020-02-24到2020-05-24
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【作业】Unit 1 The History of Chemistry Translation

1、 问题:化学的历史悠久。事实上,人类的化学活动可追溯到有历史记载以来的时期。化学家从事两种不同类型的活动:有些化学家研究并试图了解自然界,而另一些化学家则在创造自然界不存在的新物质或发现完成化学变化的新途径。自人类出现在地球上的那一刻起,就有了这两方面的活动,但上世纪其步法大大加快了。
评分规则: 【 语句通顺,用词准确.

Unit 2 Branches of Chemistry Physical chemistry

1、 问题:From which angles does Physical Chemistry look at chemical reaction?
选项:
A: Reactions of different groups of elements and compounds
B:Reactions between atoms
C: Mathematics and physics
D: Biology
答案: 【 Mathematics and physics

2、 问题:How do we describe the role of physical chemistry?
选项:
A: Foundational 
B:At the leading edge of scientific research
C:Fast growing
D:Closely related to engineering practice
答案: 【 Foundational 

3、 问题:Why does Physical Chemistry deal with Thermodynamics?
选项:
A:Because it cares about the energy levels and changes involved in chemicals and chemical reactions
B:Because it cares about the enthalpies of chemicals
C:Because it studies the energy and thermodynamic properties of a system
D:Because chemical reactions do not involve endothermic or exothermic effect
答案: 【Because it cares about the energy levels and changes involved in chemicals and chemical reactions;
Because it cares about the enthalpies of chemicals;
Because it studies the energy and thermodynamic properties of a system

4、 问题:What does the picture mean?
选项:
A:Crystal structure of a compound
B: A NaCl particle
C:An ordered arrangement of a crystalline matter
D:A small sand
答案: 【Crystal structure of a compound;
An ordered arrangement of a crystalline matter

5、 问题:When chemical bonds are broken, what will happen?
选项:
A:Exothermic effect   
B:Temperature rising
C:Endothermic effect 
D:Temperature falling
答案: 【Exothermic effect   ;
Temperature rising

6、 问题:When chemical bonds are formed, what will happen?
选项:
A:Exothermic effect 
B:Temperature rising 
C:Endothermic effect 
D:Temperature falling
答案: 【Endothermic effect ;
Temperature falling

7、 问题:Why Physical Chemistry studies Kinetics?
选项:
A:Because Kinetics is about speed of reaction
B:Because reaction rate is very important
C:Because thermal effect happens in chemical reaction
D: Because sometimes reaction rate needs to be improved
答案: 【Because Kinetics is about speed of reaction;
Because reaction rate is very important;
 Because sometimes reaction rate needs to be improved

8、 问题:What is the function of catalysts?
选项:
A:Changing the rate of chemical reactions

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