推 justice7:這樣真的寫的完嗎 06/26 09:16
課程名稱︰普通化學乙
課程性質︰
課程教師︰周必泰
開課系所︰材料系、土木系
考試時間︰2 hr 25 min (其實老師好像是…愛考多久就多久)
是否需發放獎勵金：是的，謝謝
（如未明確表示，則不予發放）
試題 :
(普化乙2) General Chemistry (II) (Total Score 220)
Final Examination 2006/6/23
I(90 points) Explain the following Definition
1. Trouton's rule (3)
2. (a) exothermic processes, (b) endothermic process, (c) endergonic
process, (d) exergonic process (3 points each)
3. (a) second law of thermodynamics, (b) third law of thermodynamics
(3 points each)
4. (a) coltaic cell (b) electrolytic cell, (c) secondary cell, (d) fuel
cell (3 points each)
5. The cell below is "shorthand" for an electrochemical cell
Zn(s)∣Zn2+(aq)∥Cu2+(aq)∣Cu(s)
specify the anode, cathode and salt bridge(5)
6. What does the s-block elements mean?(3)
7. Explain the diagonal relationship (3). According to the diagonal
relationship, which element is Boron(B) similar to? (3)
8. Give an example of application for KO2. (3)
9. Give the definition of (a) hard water, (b) temporary hardness and
(c) permanent hardness. (3 points each)
10. Explain the deionized water. (3)
11. describe the free electron model (classical model) and quantum
mechanical model for the metal conductivity (5). What is the drawback(缺點)
of the classical model?(5)
12. (a) Using the band gap theory to explain the semiconductor, (b)p-type
semiconductor, (c) n-type semiconductor. (3 points each)
13. Based on the p-n junction, describing the photovoltaic cell.(3)
14. Explain the difference between addition polymerization and condensation
polymerization (3)
15. Explain vulcanization (3)
II Questions (55 points)
(10) 1. Using the relationship ΔStotal=ΔSuniverse=ΔSsystem+ΔSsurroundings
and the definition of entropy to prove:
-TΔSuniverse=ΔHsystem-TΔSsystem
(10) 2. Give a reaction mechanism of depositing CaCO3 form acid rain,
leading to stalactites, stalagmites(鐘乳石等), and other cave formations. (5)
(5) 3. The following reaction is spontaneous under standard-state
conditions at room temperature (chapter 18習題)
CO(g) + Cl(g) → COCl2(g)
To make it a nonspontaneous reaction, would you raise or lower the
temperature? Explain.
(10) 4. Supply a name or formla for each of the following:(chapter 20 習題)
(a) K2O2, (b)Ca(HCO3)2, (c)barium phosphate, (d) strontium nitrate
tetrahydrate
(10) 5. Assume that all the cations in a container holding 1.00L of
hard water are Ca2+, A 25.00-mL sample of this water is passed throught
a cation0exchange resin having H3O+ as counterions. The water leaving
the column is found to have a pH of 2.37. Determine the hardness of the
water, expressed as ppm Ca2+(Ca:atomic weight 40)(chapter 20, 855頁例題).
(10) 6. (a) Represent the structures of addition polymers made from the
following monomer, by showing at least four repeating units.
Styrene: H2C═C─⊕(苯環)
H
(b) Based on the partion structural formula of Kevlar(R) given below,
determine the structure of the monomer(s). (chapter 24習題)
O O O O
║ ║ ║ ║
─C─⊕─C─NH─⊕─NH─C─⊕─C─NhH─
III. (75) Multiple Choice Questions (單選題) (3 points each)
1) For the phase transition from solid to liquid, △Hfuusion = 15.1 kJ/mol
and △Sfusion= 487 J/molK. At what temperature does this phase transition
take place?
A) -242K
B) -273K
C) 31.0K
D) -205K
E) 0.0310K
2) The following reaction is endothermic: 3O2(g)→2O3(g). The reaction is
A) spontaneous at alltemperatures.
B) non-spontaneous at all temperatures.
C) spontaneous at low temperatures.
D) spontaneous at high temperature.
3) Which of the following is the most abundant element in the universe?
A) H
B) He
C) C
D) Fe
E) Si
4) For which of the following processes will △S° system be the most
positive?
A) 2NH3(g)→N2(g)+3H2(g)
B) Hg(l)→Hg(s)
C) C2H2(g)+H2(g)→C2H4(g)
D) 4Fe(s)+3O2(g)→2Fe2O3(s)
E) 2SO2(g)+O2(g)→2SO2(g)
5) What conditions apply to a reaction that is not spontaneous at low
temperature but becomes spontaneous at higher temperatures?
A) increase in enthalpy and decrease in entropy
B) decrease in enthalpy and increase in entropy
C) increase in enthalpy and increase in entropy
D) decrease in enthalpy and decrease in entropy
E) No conditions allow for such a result.
6) Arrange the following compounds in the exppected order of increasing
solubility in water(lowest solubility first, highest solubility last).
LiOH Sr(OH)2 Ba(OH)2 Ca(OH)2
A B C D
A) D,B,C,A
B) A,D,B,C
C) A,B,C,D
D) D,A,B,C
E) C,D,B,A
7) Which of the following atoms would be the most reactive with water
at room temperature?
A) Li
B) Mg
C) K
D) Ba
E) Ca
8) Which one of the following precesses if not spontaneous and endothermic
(at 1 atm)?
A) H2O(l)→H2O(g) at 101°C
B) melting of ice at 10°C
C) sublimation of CO2 at 25°C
D) dissolving the solyble salt, NH4NO3, and the tempeature drops
E) condensation fo water at 99°C
9) Which of the following statements is incorrest?
A) In addition plymerization, all of the atoms in the monoer end up
in the polymer.
B) In dondensation polymerization, monomer molecules combine and small-
molecule byproducts are "split out" from the polymer.
C) Cross-linking of polymer chains results in strength and rigidity.
D) High-denisity polyethylene consists primarily of branched chains.
E) Elastomers can return to their original shape after being deformed.
10) Liquid sodium metal is often used as a heat transfer medium in
nuclear reactors and automobile engine valves because of all of the
following reason except:
A) higher specific heat than most liquid metals.
B) good thermal conductivity.
C) low density.
D) low vapor pressure.
E) High viscosity.
11) which metal readily forms a superoxide with excess oxygen gas?
A) Li
B) Na
C) K
D) Mg
E) Ca
12) What are the three step in an addition polymerization mechanism?
A) initiation, propagation, termination
B) vulcanization, condensation, sublimation
C) liquidfication, vaporiztion, solidification
D) addition, condensation, extraction
E) theory, practice, application
13) Which of the following name and formula combinations is incorrect?
A) Mg2N3, magnesium nitride
B) K2CO3, potassium carbonate
C) LiHCO3, lithium hydrogen carbonate
D) CaSO4, calcium sulfate
E) BeO, beryllium oxide
14) Which of the following compounds would be predicted to most closely
follow Trouton's Rule?
A) CH3(CH2)6CH2OH
B) CH3(CH2)8CH3
C) HOCH2(CH2)6CH2OH
D) CH3(CH2)8CH2OCH3
E) CH3O(CH2)6CH2OH
15) Which is necessarily trye for a spontaneous process?
A) △Suniverse > 0
B) △Ssystem > 0
C) △H < 0
D) △E > 0
E) q = 0
16) Consider a cell made up of two half cells consisting of the same
metal in solutions of the metal ion of different concentrations. Which
statement is incorrect?
A) The E°cell is zero.
B) The cell containing more concentrated electrolyte is the anode.
C) The spontaneous reaction will proceed until the concentrations become
equal.
D) Reduction occurs in the more concentrated solution.
E) The greater the ratio in concentrations between the two cells, the
greater is the initial voltage.
17) Balance the following half-reaction under basic conditions and
indicate the coefficient of water and the side of the reaction to which
it is added.
HCHO + MnO2(s) → MnO4- + CH3OH
A) 4,left
B) 1,right
C) 2,left
D) 2,right
E) 3,left
18) Some metals behave as insulators because
A) the valence band is not full of electrons.
B) the conduction band lies below the valence band.
C) the conduction band is full of electrons.
D) the conduction band is much higher in energy than the valence band.
E) the metals are coated with a metal oxide.
19) The lower density of the alkali metals compared to the alkaline earth
metals is due to their
A) lower atomic weights.
B) lower ionization energies.
C) greater atomic radii.
D) haveing only one valence electron.
E) reactivity with water.
Table 1 Selected Standard Electrode Potentials at 25°C
Reaction E°,V
Mg2+(aq) + 2e- → Mg(s) -2.356
2 H+(aq) + 2e- → H2(g) 0.0
O2(g) + 4H+(aq) + 4e- → 2H2O +1.229
Cl2(g) + 2e- → 2Cl-(aq) +1.358
20) According to Table 1, predict the products from the electrolysis
of aqueous MgSO4.
A) Mg(s), O2(g)
B) H2(g), O2(g)
C) H2(g), S(s)
D) Mg(s), S(s)
E) H2(g), Mg(s)
21) What are the expected products of the following reaction?
Be(s) + H2O(l) →? (not balanced)
A) Be(OH)2(aq) + H2(g)
B) Be(OH)2(aq) + H2O
C) BeH2(aq) + O2(g)
D) Becl2(aq) + H+(aq
E) no reaction
22) What is Keq for an electrochemical reaction involving the transfer
of 3 electrons, if E°cell=1.14V at 148°C?
A) 1.01
B) 1.38*10^-2
C) 2.73*10^-1
D) 2.13
E) 2.40
23) Predict the signs of △S°,△H°, and △G° for the following prec
ess(at 25° C):
A)△S° △H° △G°
+ + -
B)△S° △H° △G°
+ - -
C)△S° △H° △G°
+ + +
D)△S° △H° △G°
- - -
E)△S° △H° △G°
- + +
24) The overall cell reaction during discharge of the lead-acid battery is
PbO2(s) + Pb(s) + 2H2SO4(aq) → 2PbSO4(s) + 2H2O(l)
Which statement is incorrect?
A) The lead serves as the anode.
B) The PbO2 clectrode would be positive during discharge.
C) Upon recharging, the above reacton occurs in reverse.
D) Upon recharging, the density of the electrolyte will increase.
E) Upon recharging the lead electrode is negative.
25) How many electrons are transferred in the following reaction?
6Br-(aq) + Cr2O72-(aq) +14H+ → 2Cr3+(aq) + 7H2O + 3 Br2(l)
A) 1
B) 2
C) 3
D) 6
E) 14
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