G 30 h 35 i 50 j 100 chemistry 213 xmas 04 5 using

g) 30% h) 35% i) 50% j) 100%

CHEMISTRY 213 XMAS 04 5
Using the following frequencies (Hz):
a) 4.7 x 10 8 b) 5 x 10 8 c) 5.3 x 10 8 d) 5.3 x 10 9 e) 4.7 x 10 11
f) 1 x 10 14 g) 7.5 x 10 14 h) 1 x 10 15 i) 7 x 10 15 j) 3 x 10 18
42 At what frequency will the alcohol-OH of GHB absorb ir radiation
43 What resonance frequency would be used to detect the F of rohypnol, assuming the same
instrument as Questions 33-35. ( γ
F
= 0.94 γ
H
)
44 Some airports are proposing to scan passengers using a frequency of 10 12 Hz; what is
the energy of a mole of “airport” photons ( J mole -1 )
The molecule H
2
N-C / N is found in space
Some of its relevant ir frequencies are at (cm -1 )
45 Which corresponds to the C / N stretch
46 Which is the symmetrical N-H stretch
47 Which is the C-N stretch
48 Which is the N-H bend
49 How many fundamental frequencies are there :

CHEMISTRY 213 XMAS 04 6
Some of the equations we have used this term are:
E
J
= h 2 J(J+1)/8 π 2 I
ν = (1/2 π )(k/ μ ) 1/2
ν = ( γ /2 π )B
o
N
U
/N
L
= e -
Δ
E/RT
I = m
1
m
2
r 2 /(m
1
+m
2
)
Using the choices (cm -1 )
a) 20 b) 40 c) 60 d) 80 e) 120 f) 160 g) 200 h) 240 i) 320 j) 400
50 If in the microwave spectra of H
2
O, the energy of the 1st line = 40 cm -1 , what (in cm -1
will be the energy of the transition from E
1
to E
2
(E
0
= lowest energy level).
)
51 What (in cm -1 ) will be the energy of the 5th level, E
4
.
52 The centre of the fundamental band for CO is at 2144 cm -1 , and the spacing between the
first two lines in the P branch of the rotational spectrum is 4 cm -1 . What will be the
frequency (cm -1 ) of the third line in the R branch
53 In Question 52, what will be the frequency of the transition from v=0, J=2 to v=1, J=3 54 In Question 52, where would the first hotline of CO be
55 In Question 52, what is the zero point energy for the C / O bond in J mol -1
a) 10 -3 to 10 -4 b) 10 -2 to 10 -3 c) 0.1 to 10 -2 d) 0.1 to1 e) 1 to 100
f) 10 2 to 10 3 g) 10 3 to 10 4 h) 10 4 to 10 5 i) 10 5 to 10 6 j) 250