→ srwff :化學系已收 09/12 11:28
課程名稱︰普通化學丙
課程性質︰機械系必修
課程教師︰陳振中
開課學院：工學院
開課系所︰機械系
考試日期（年月日）︰98年4月9日
考試時限（分鐘）：兩節課+20~30min
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
Section A (50%):
1.Which of the following is the First law of thermodynamics?
a.Energy can never be created or destroyed but it can be changed from one
form to another.
b.Two bodies in thermal contact are at thermal equilibrium with each other if
the two bodies are at the same absolute temperature.
c.Any process carried out in several steps, the overall ΔH is equal to the sum
of the enthalpy changes (signed) for the individual steps.
d.S=K lnΩ
B
2.In an endothermic reaction, if we double the amount of reactants, which of
the following statements is correct?
a. The amount of heat evolved will be doubled
b. The amount of heat absorbed will be the same
c. The final temperature will be two times higher
d. The amount of heat evolved will be the same
3.Which of the following has the largest entropy at room temperature?
a. One mole of He atoms
b. One mole of CO molecules
c. One mole of CO2 molecules
d. 10 g of liquid water
4.Which of the following reaction is NOT favored by the system entropy?
a. H2 (g) + Br2 (g) → 2 HBr (g)
b. 2H2 (g) + O2 (g) → 2 H2O (g)
c. H2O (l) → H2O (g)
d. None of the above
5.Which of the following equation is the correct van der Waals equation?
方程式打起來太難看了 課本上就有正確的van der Waals equation
6.Referring to the following diagram, initially the pressure and volume of the gas
system is P1 and V1, respectively.
(有一張圖 注射針筒中有氣體 另外掛了重量為M的一個砝碼作為力量)
What is the work done by the gas system when the mass is changed in the
following way:
M→ M/2 → M/4 → 0
a. 0.75 P1V1 b. 0.75 P1V1 c. P1V1 d. 1.16P1V1
7.The best laboratory vacuum system can pump down to as few as 4.5 108
molecules per cubic meter of gas. Calculate the corresponding pressure, in
atmospheres, assuming a temperature of 0 C.
a. 1.7x10^17 atm b. 3.8x10^12 atm
c. 3.8x10^17 atm d. 1.0x10^9 atm
8.If the half life of a reaction with respect to a reactant concentration is
0.693/k, what is the reaction order of the reactant?
a. First order b. Second order
c. Third order d. Zero order
9.The amino acid glycine, H2N-CH2-COOH, can undergo the following equilibria
in water:
H2N-CH2-COOH + H2O <--> H2N-CH2-COO- + H3O+ , Ka = 4.3x10^3
H2N-CH2-COOH + H2O <--> +H3N-CH2-COOH + OH- , Kb = 6.0x10^5
What is the equilibrium constant for the intramolecular proton transfer to form
a zwitterions (H2N-CH2-COOH <--> +H3N-CH2-COO)?
a. 2.2 103 b. 2.5 107 c. 0.014 d. 2.6 107
10. For a pH value of 2.304, the concentration of H+ should read
a. 4.96x10^3 b. 4.97x10^3 c. 5.0x10^3 d. 4.966x10^3
11. If we use a pH meter to measure the pH of the following solutions,
solution A: 0.001 M KCl (aq),
solution B: 0.01 M NaOH,
solution C: 0.01 HCl + 1 M KCl,
what would be the expected readings?
a. Solution A: pH = 7; solution B: pH = 12; solution C: pH = 2
b. Solution A: pH = 7; solution B: pH > 12; solution C: pH = 2
c. Solution A: pH = 7; solution B: pH < 12; solution C: pH > 2
d. Solution A: pH = 7; solution B: pH > 12; solution C: pH < 2
12. Consider a fuel cell making use of the methanol combustion:
CH3OH (g) + 3/2 O2 (g) A CO2 (g) + 2H2O (l)
ΔG0f(CO2) = 394 kJ/mol
ΔG0f(H2O) = 237 kJ/mol
ΔG0f(CH3OH) = 163 kJ/mol
Which of the following statement is INCORRECT?
a. Water is consumed at the cathode and is produced at the anode.
b. The emf of the fuel cell is 0.122 V.
c. There are 6 electrons transferred for the reaction of each methanol molecule
d. A fuel cell always requires a suitable membrane to separate the chemical
species reacting at the anode and cathode.
13. What is the oxidation number of V in V2O5?
a. 7 b. +6 c. +7 d. +5
14. Calculate the molarity of pure water.
a. 10 M b. 1.0 M c. 55.6 M d. 5.5 M
15. Arsenic and many of its compounds are especially potent poisons. The World
Health Organization's standard of arsenic level in drinking water is 10 ppb.
That is this level expressed in mg per liter?
a. 10 mg/L b. 0.01 mg/L
c. 0.0001 mg/L d. 0.001 mg/L
16. Which of the following is non-colligative property?
a. Vapor pressure
b. Osmotic pressure
c. Density
d. Boiling point elevation
17.Which of the following statements is a wrong description of the
ideal gas model?
a. There is no interaction among the gas molecules
b. The collision between two gas molecules is totally elastic
c. The volume of each gas molecule is perfectly spherical
d. Each molecule is undergoing linear motion between collisions
18. Referring to the following reaction profiles:
(我不會畫曲線==")
Which of the following statements is INCORRECT?
a.The reaction intermediate denoted by A has lower energy than the reactants
because it has a strong interaction with the surface of the catalyst.
b.The amount of the catalyst does not affect the equilibrium position of the
reaction.
c.The blue profile corresponds to category of heterogeneous catalysis
d.The reaction rate of the blue profile is two times faster than that of the
red profile.
19. Which one of the following reactants and product is a Lewis acid?
F CH3 F CH3
| | | |
F--B + :N--CH3 ----> F--B--N--CH3
| | | |
F CH3 F CH3
a. BF3 b. N(CH3)3
c. BF3-N(CH3)3 d. None of them
20. Calculate the pH of an aqueous solution of 1.0% (vol/vol) of
trifluoroacetic acid (TFA). The molar mass of TFA is 114.02 g/mol and its
density is 1.5351 g/cm3. Assume that TFA will completely dissociate in water.
a. 5.42 b. 4.72 c. 2.00 d. 0.87
SectionB 是從作業抓的 隨每年助教而定 自求多福吧~~~
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