[試題] 張大釗普化丙小考

[yuncheng42 (幸運瘦子)]

課程名稱︰普化丙
課程性質︰系定必修
課程教師︰張大釗
開課系所︰醫技系、牙醫系、藥學系
考試時間︰2005.12.28
註:第二次小考,範圍: ch.7- ch.10, Chemical Principals

試題 :

1) Which one of the following acids is the strongest?
   (a) Hydrocyanic acid (Ka=2.0*10^-4)
   (b) Hypochlorous acid (Ka=3.0*10^-8)
   (c) Methanoic acid (Ka=2.0*10^-4)
   (d) Carbonic acid (Ka=4.2*10^-7)
   (e) Ethanoic acid (Ka=1.8*10^-5)(5 pts)

2) Which one of the following solutions is correctly described as a strong
   acid?
   (a) 0.25M CH3COOH
   (b) 0.015M HCl
   (c) 0.015M NH3
   (d) 0.15M H2SO3(5 pts)

3) (a) Give a definition of Acid rain (components and pH<?), and (b) Its
   equilibrium equations (two steps) and equilibrium constants.(12 pts)

4) Calculate the vapor pressure of water at 25℃, if ΔG0=8.59kJ.(8 pts)

5) Calculate the pH value of a 1.2*10^23 molecules of NaOH in 1 liter H2O?
   How much [OH-]  is contributed from the autoionization of water?(12 pts)

6) Calculate pH using 40.0 mL 0.10M HAc (Ka=1*10^-5) and 0.10M (a) 0 mL NaOH,
   (b) 20.00 mL NaOH, (c) 30.00 mL NaOH, (d) 40.00 mL NaOH, (e) 50.00 mL
   NaOH. (20 pts)

7) 5.0 mol of an ideal gas is taken from state A to state B by two different
   pathways: calculate q, w, ΔE, and ΔH for both pathways.(20 pts)
                 ---1---3.0 atm 55.0 L---2---
   3.0 atm 15.0 L                            6.0 atm 20.0 L
                 ---3---6.0 atm 15.0 L---4---

8) The normal freezing point of mercury is -38.9℃, and its molar enthalpy of
   fusion is ΔH fusion=2.29 kJ/mol. What is the ΔS of the system when 0.2 M
   Hg (l) freezes at the normal freezing? (8 pts)

9) The temperature increased by 4.43℃ if 1 g of C2H2 (g) was burn in a
   calorimeter with C= 11.3 kJ/℃, calculate the ΔH of C2H2 (g).(10 pts)

10) Calculate q, w, ΔE, ΔH, ΔS, ΔG for reversibly compressing a mole of
    steam to liquid water at 100℃. (ΔH vap= 540 cal/g)(20 pts)

11) The Haber process for the production of ammonia,
    N2(g) + 3 H2(g) → 2 NH3(g) ΔH0= -92 kJ/mol and ΔS= -198.4 J/K
   a) Calculate the ΔG0 of this reaction at 25℃,
   b) Under what temperature condition, the reaction favors the product.
   c) Calculate ΔG if double the pressure of NH3,
   d) Calculate the value of K at 900℃. (20 pts)

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