2010 AP Chemistry化学真题系列之简答题Form B免费下载

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2010 AP Chemistry Free-Response Questions （Form B）Free Download

2010 AP 化学简答题 Form B部分免费下载

考试时会提供花常用的等式与常量

以及化学元素周期表

此套Section II试卷共6题

每道大题含有不同数量的小题

共计时95分钟

Part A计55分钟，第1-3题各20分

Part B计40分钟，第四题值10分，第5第6题各15分

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Section II, Part A,YOU MAY USE YOUR CALCULATOR FOR PART A可使用计算器：

1）The compound butane, C₄H₁₀ , occurs in two isomeric forms, n-butane and isobutane (2-methyl propane). Both compounds exist as gases at 25°C and 1.0 atm.

1. Draw the structural formula of each of the isomers (include all atoms). Clearly label each structure.
2. On the basis of molecular structure, identify the isomer that has the higher boiling point. Justify your answer.
   The two isomers exist in equilibrium as represented by the equation below.
   
   Suppose that a 0.010 mol sample of pure n-butane is placed in an evacuated 1.0 L rigid container at 25°C.
3. Write the expression for the equilibrium constant, K_c , for the reaction.
4. Calculate the initial pressure in the container when the n-butane is first introduced (before the reaction starts).
5. The n-butane reacts until equilibrium has been established at 25°C.
   1. Calculate the total pressure in the container at equilibrium. Justify your answer.
   2. Calculate the molar concentration of each species at equilibrium.
   3. If the volume of the system is reduced to half of its original volume, what will be the newconcentration of n-butane after equilibrium has been reestablished at 25°C ? Justify your answer.
      Suppose that in another experiment a 0.010 mol sample of pure isobutane is placed in an evacuated 1.0 L rigid container and allowed to come to equilibrium at 25°C.
6. Calculate the molar concentration of each species after equilibrium has been established.

 

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2010 AP Chemistry Free-Response Questions Free Download

2010 AP 化学简答题部分免费下载

考试时会提供花常用的等式与常量

以及化学元素周期表

此套Section II试卷共6题

每道大题含有不同数量的小题

共计时95分钟

Part A计55分钟，第1-3题各20分

Part B计40分钟，第四题值10分，第5第6题各15分

下载方式请点击下方链接

2010 AP Chemistry FRQ真题题目

 

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