AP化學(xué)考試旨在測試學(xué)生對化學(xué)原理、實驗技能和分析能力的理解和掌握程度，涵蓋物質(zhì)的性質(zhì)和變化、化學(xué)反應(yīng)和方程式、化學(xué)平衡、熱化學(xué)、電化學(xué)、原子結(jié)構(gòu)和周期表、化學(xué)鍵和分子結(jié)構(gòu)、氣體和溶液的性質(zhì)和行為等方面，有學(xué)生在學(xué)習(xí)國際課程時，在向AP課程輔導(dǎo)咨詢：輔無憂有2020年AP化學(xué)考試真題嗎？那下面輔無憂老師給大家分享部分真題內(nèi)容。

    Part 1: Multiple Choice Questions (60 points)

    Which of the following is the correct expression for the reaction rate of a zero-order reaction with respect to a reactant X?A. Rate = k[X]

    B. Rate = k[X]^2

    C. Rate = k

    D. Rate = k/2[X]^2

    Which of the following statements is true about the reaction represented by the equation below?2SO2(g) + O2(g) → 2SO3(g) ΔH = ?196 kJ/mol

    A. The reaction is exothermic, and heat is absorbed.

    B. The reaction is endothermic, and heat is released.

    C. The reaction is exothermic, and heat is released.

    D. The reaction is endothermic, and heat is absorbed.

    The solubility product constant (Ksp) for a sparingly soluble salt is 4.0 × 10?7 at 25°C. What is the molar solubility of the salt in water?A. 2.0 × 10?3 M

    B. 5.0 × 10-4 M

    C. 2.0 × 10-4 M

    D. 5.0 × 10-7 M

    Part 2: Free Response Questions (60 points)

    Consider the reaction below:2H2(g) + O2(g) → 2H2O(g)

    a) Write the balanced chemical equation for this reaction.

    b) Calculate the enthalpy change (ΔH) for the reaction, given the following bond energies: H–H = 436 kJ/mol, O=O = 498 kJ/mol, and O–H = 463 kJ/mol.

    c) Determine whether the reaction is exothermic or endothermic, and explain your reasoning.

    An aqueous solution of sodium chloride is electrolyzed, using inert electrodes.a) Write the balanced chemical equation for the reaction that occurs at the anode.

    b) Explain why the pH of the solution at the anode decreases as the electrolysis proceeds.

    c) Write the balanced chemical equation for the overall reaction that occurs during the electrolysis.

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