109年 - 109東吳大學_碩士班招生考試_化學系：綜合化學#100831

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一、 1. Draw resonance structures for SCN− (carbon is the central atom)

(a)

(b) [Co(en)₂Cl₂] (en = ethylenediamine)

(a) Pauli exclusion principle

(b) Hund’s rule

(d) Shielding effect.

(a) (Td)

(b) (Oh, low-spin)

(d) (Oh, high-spin)

(e) (Oh, low-spin)

(f)

二、 1. The temperature of 4.05 moles of an ideal gas increases from 15 to 55o C as the gas is compressed adiabatically. Calculate q, w, △U, and △H for this process assuming that = 3/2 R. (8 points)

(a) What is the averages power (energy per unit time) in units of watts (a W = 1 J/s) associated with such a pulse?

(b) How many photons are emitted in such a pulse?

【已刪除】(b) How many photons are emitted in such a pulse?

3. As known the function ψ(x) = A(y/b)[1 – (y/b)] is an acceptable wavefunction for the 1-D infinite depth box of length b. Calculate the normalization constant A and expectation value and (6 points)

4. Determine the total collisional frequency for CO2 at 2 atm and 300 K. And at what temperature would the collisional frequency be 20% of the value determined in previously state? As known for CO2, σ = 5.2 x 10-19 m2 and M = 0.044 kg/mol. (7 points)

(a) Resonance fluorescence.

(b) Retention time.

(d) Internal standard.

2. A 50 mL of 0.05M NaCN solution is titrated with 0.1M HCl. Calculate the pH after the addition of 10 mL of acid. Ka for HCN=.

(a)

(b) CH₃CH₂CH₂OH CH₃CH₂CH₂CH₂Cl

CH₃CH₂CH₂CH₂OH HOCH₂CH₂OH

(a) HF HCl HBr HI

(b)H₂O NH₃ CH₄ HF

(a)

(b)

(1) A: CH₃CH₂CH₂CH₂Br B: (CH₃)₃CBr

(2) A: 1M CH₃OH B: 2M CH₃OH

(3) A: 1M RX B: 2M RX

(4) A: RI B: RBr

7. Classify the following species as aromatic, nonaromatic, or antiaromatic:

8. Derive the structure of a compound based on the following spectrum.

109年 - 109東吳大學_碩士班招生考試_化學系：綜合化學#100831

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