2016年AP化学（选择题+简答题）真题及答案下载（PDF）

2016年AP化学（选择题+简答题）真题及答案下载（PDF）

以下为2016年AP化学选择题真题部分：

1）In which of the following liquids do the intermolecular forces include dipole-dipole forces?

A.F₂(l)

B.CH₄(l)

C.CF₄(l)

D.CH₂F₂(l)

2)Which of the following best helps explain why an increase in temperature increases the rate of a chemical reaction?

A.At higher temperatures, reactions have a lower activation energy.

B.At higher temperatures, reactions have a higher activation energy.

C.At higher temperatures, every collision results in the formation of product.

D.At higher temperatures, high-energy collisions happen more frequently.

3)A sample of a hard, solid binary compound at room temperature did not conduct electricity as a pure solid but became highly conductive when dissolved in water. Which of the following types of interactions is most likely found between the particles in the substance?

A.Ionic bonds

B.Metallic bonds

C.Covalent bonds

D.Hydrogen bonds

余下2016年AP化学选择题真题及答案省略！

2016年AP化学简答题真题如下：

部分真题预览：

1）A student investigates the enthalpy of solution, ΔH_soln, for two alkali metal halides, LiCl and NaCl. In addition to the salts, the student has access to a calorimeter, a balance with a precision of ±0.1g, and a thermometer with a precision of ±0.1°C.

a.To measure ΔH_soln for LiCl, the student adds 100.0g of water initially at 15.0°C to a calorimeter and adds 10.0g of LiCl(s), stirring to dissolve. After the LiCl dissolves completely, the maximum temperature reached by the solution is 35.6°C.

• (i)Calculate the magnitude of the heat absorbed by the solution during the dissolution process, assuming that the specific heat capacity of the solution is4.18 J/(g.°C) . Include units with your answer.
• (ii)Determine the value of delta ΔH_soln for LiCl in kJ/mol_rxn.

To explain why ΔH_soln for NaCl is different than that for LiCl, the student investigates factors that affect ΔH_soln and finds that ionic radius and lattice enthalpy (which can be defined as the ΔH associated with the separation of a solid crystal into gaseous ions) contribute to the process. The student consults references and collects the data shown in the table below.

(b) Write the complete electron configuration for the Na⁺ ion in the ground state.

(c) Using principles of atomic structure, explain why the Na⁺ ion is larger than the Li⁺ ion.

(d) Which salt, LiCl or NaCl, has the greater lattice enthalpy? Justify your answer.

(e) Below is a representation of a portion of a crystal of LiCl. Identify the ions in the representation by writing the appropriate formulas ( Li⁺ or Cl^–) in the boxes below.

(f) The lattice enthalpy of LiCl is positive, indicating that it takes energy to break the ions apart in LiCl. However, the dissolution of LiCl in water is an exothermic process. Identify all particle-particle interactions that contribute significantly to the dissolution process being exothermic. For each interaction, include the particles that interact and the specific type of intermolecular force between those particles.

余下2016年AP化学简答题真题及答案省略！

2016年AP化学（选择题+简答题）真题及答案下载（PDF），完整版下载，20元有偿！