課程名稱︰普通化學乙
課程性質︰系定必修兼物質科學領域通識
課程教師︰牟中原
開課學院：工學院
開課系所︰材料科學與工程學系
考試日期（年月日）︰2006/12/05
考試時限（分鐘）：一百二十分鐘
是否需發放獎勵金：是,謝謝
（如未明確表示，則不予發放）
試題 :
1. Supply either a formula to match the name or a name to match the formula
for each of the following acids and bases.(16 points)
(a) HBr
(b) HNO2
(c) H3PO3
(d) chlorous acid
(e) potassium hydroxide
(f) sulfurous acid
(g) Ba(OH)2
(h) hydroiodic acid
2. Using spdf notation, write the ground-state electron configuration of
(a) Mg
(b) F
(c) O
(d) Be
(e) P
(f) Si
(g) C
(h) K
(i) Sc (9 points)
3. Arrange each set of the following elements in order of increasing
first ionization energy, and explain the basis for this order.(9 points)
(a) Ca,Mg,Ba
(b) P,Cl,Al
(c) F,Na,Fe,Cl,Ne
4. Please write down the first law of thermodynamics.(8 points)
(a) Explain the meaning of state function
(b) Explain why work is not a state function
5. It takes 44 s for a sample of N2(g) to effuse through a tiny orifice.
Determine the molecular masses of gases whose effusion time under exactly
the same conditions are (a) 75 s and (b) 42 s.(8 points)
6. Calculate heat of combustion for the following reaction.(8 points)
o o
ΔHf (C2H2)=-223.73 KJ/mol ; ΔHf (CO2)=-393.52KJ/mol ;
o o
ΔHf (H2O,l)=-285.84 KJ/mol ; ΔHf (C2O4H2)=-487.02 KJ/mol ;
o o
ΔHf (CH3CHO)=-166.76 KJ/mol ; ΔHf (CH3OH)=-201.17 KJ/mol ;
(a) C2H2(g) + 5/2 O2(g) -> 2 CO2(g) + H2O(l)
(b) CH3CHO(g) + 5/2 O2(g) -> 2 CO2(g) + H2O(l)
(c) (CO2H2)2(s) + 1/2 O2(g) -> 2 CO2(g) + H2O(l)
(d) CH3OH(l) + 3/2 O2(g) -> CO2(g) + 2 H2O(l)
7. In an experiment, the position of an electron can be measured with
an accuracy of +-0.005nm.
What will be the accuracy in measuring the momentum of an electron?
(h=6.626*10^-34 JS)(4 points)
8. When it undergoes complete combustion in oxygen, a 658.0 mg sample of
adipic acid HOOC(CH2)4COOH, a substance used in manufacture of nylon,
give of 12.63 KJ of heat to the surrounding. Calculate the standard
enthaply of formation of solid adipic acid. Assume that the reactants
and the products of combustion are at 25℃ and 1 atm pressure.(6 points)
9. Three oxides of nitrogen N2O, NO and NO2, were known to Dalton and figured
prominently I his proposal of the law of multiple proportions. Explain how
he would have been able to use this law to verify the existence of N2O5 but
not N2O4, two oxides of nitrogen that are now well known.(8 points)
10.Magnesium-lithium alloy is used where its extremely low density is desirable
property. A piece of this alloy weighing 0.0297 g is analyzed by adding
HCl(aq). The liberated hydrogen gas was collected over water at 19℃ and
at atmospheric pressure of 746 Torr and was found to occupy 40.71 mL.
Calculate the percentage of magnesium and lithium in the alloy.(The vapor
pressure of water at 19℃ is 16.5 mmHg.)(10 points)
11.The greatest probability of finding the electron in a small volume electron
of the 1s orbital of the hydrogen atom is at the nucleus. Yet, the most
probable distance of the electron from the nucleus is 52.9 pm. How can you
reconcile these two statements?(6 points)
12. A Helium/hot air balloon consitsts of a closed center Helium balloon and a
expandable hot air balloon surrounding Helium balloon in the outer. The
Helium balloon was filled with 36 Kg He(g). The total weight load of the
balloon is 600 Kg (including the gases nd balloon). The density of air is
1.29 Kg/m^3.
(a)Without hot air does the balloon take off at 1 atm 25℃?
(b)If not, how many amounts of fuel (propane) are needed to enable the
balloon take off?
Assume all gases in the combustion reaction are ideal gases and the
temperature of all gases is at 100℃ in the hot air balloon.(8 points)
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※ 編輯: yulunchen 來自: 203.73.164.211 (12/19 23:27)
※ 編輯: yulunchen 來自: 203.73.164.211 (12/19 23:28)