1
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beFore answering.
The due time is Central
time.
001
(part 1 oF 1) 10 points
Which describes Dalton’s Law?
1.
The volume occupied by a given weight
iF gas at constant temperature is inversely
proportional to pressure.
2.
The total pressure exerted by a mixture
oF gases is the sum oF the pressures exerted by
the individual gases in the mixture.
correct
3.
The volume occupied by a given weight
oF gas at constant pressure is directly propor
tional to the absolute temperature.
Explanation:
Dalton’s Law states that the total pressure
exerted by a mixture oF ideal gases is the sum
oF the partial pressures oF those gases:
P
total
=
P
A
+
P
B
+
P
C
+
...
under constant
V
,
T
.
002
(part 1 oF 1) 10 points
IF the compression Factor
Z
is less than one For
a given gas, which van der Waals coe±cient is
the dominant one?
1.
impossible to tell
2.
a
correct
3.
b
Explanation:
Z
factors of less than 1 have attractive forces
dominating.
003
(part 1 oF 1) 12 points
How many atoms oF argon occupy 1 mL iF
the temperature is 300
◦
C and the pressure is
1
.
00
×
10

3
Torr?
1.
1
.
68
×
10
13
correct
2.
3
.
22
×
10
13
3.
2
.
44
×
10
19
4.
1
.
28
×
10
16
5.
2
.
80
×
10

11
Explanation:
004
(part 1 oF 1) 10 points
Rank the gases H
2
,
CH
3
², N
2
, C²
4
, H²
From leFt to right in terms oF the increased
nonideality that results From a reduction in
the e³ective pressure oF the gas due to inter
molecular Forces.
1.
H
2
,
CH
3
²
,
N
2
,
C²
4
,
H²
2.
H²
,
CH
3
²
,
C²
4
,
N
2
,
H
2
3.
C²
4
,
CH
3
²
,
N
2
,
H²
,
H
2
4.
H
2
,
N
2
,
C²
4
,
CH
3
²
,
H²
correct
5.
H
2
,
H²
,
N
2
,
CH
3
²
,
C²
4
6.
H
2
,
N
2
,
H²
,
CH
3
²
,
C²
4
Explanation:
The stronger the intermolecular Forces
present, the greater the nonideality.
Induced Dipole
H
2
smallest
,
most ideal
N
2
↓
C²
4
largest
Dipole

dipole
CH
3
²
Hydrogen Bonding H²
least ideal
005
(part 1 oF 1) 15 points
What is the pressure inside a system when
the systemside column in an open mercury
manometer is 75.0 mm lower than the atmo
sphere side when the atmospheric pressure is
735 mm Hg?
1.
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 Spring '09
 MCCLELLAND

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