1.6
= 0.9711 atm − 0.00576 atm = 0.965 atm
1.7
1.8
1.9
1.10
Since the total is 3.45 mol, and the total pressure is 1 atm, the partial
pressures are given by:
1.11 Cell membranes are largely lipids but they also have steroids, proteins, and sugars.
1.12 The lipids are arranged in a bilayer, with the hydrophobic chains in
the interior and the polar groups on the exterior.
1.13 The fluid-mosaic model states that the components of a membrane
are free to move within the membrane.
p(
)
.
.
.
Argon
mol
mol
atm
atm
=
=
0 033
3 45
1
00 1
p(
)
.
.
.
Oxygen
mol
mol
atm
atm
=
=
0 725
3 45
1
02 1
p(
)
.
.
.
Nitrogen
mol
mol
atm
atm
=
=
2 69
3 45
1
07 8
n(
)
.
.
.
Argon
g
g mol
mol
=
=
−
0 013
100
39 9
0 033
1
n(
)
.
.
.
Oxygen
g
g mol
mol
=
=
−
0 232
100
32 0
0 725
1
n(
)
.
.
.
Nitrogen
g
g mol
mol
=
=
−
0 755
100
28 0
2 69
1
V
T
V
T
T
T
initial
initial
nal
nal
nal
in
=
→
=
3
3
3
i itial
nal
initial
V
V
3
⎛
⎝
⎜
⎜
⎞
⎠
⎟
⎟
= (
)
.
.
298
0 9
1
K
L
0 0
283
L
K
⎛
⎝
⎜ ⎜
⎞
⎠
⎟ ⎟ =
n
PV
RT
(
)( )
( .
=
=
×
−
1
2
8 21 10
2
atm L
L atm/(K mol) ))(
)
.
283
0 086
K
mol
=
P
nRT
V
( .
)( .
))(
)
=
=
×
0 1
8 31
298
10
mol
J/(K mol
K
.
10
24 8
3
3
−
=
m
kPa
P
.
.
.
=
×
×
×
−
2448 5
24 96 10
1
1 01 10
3
3
5
J
m
atm
Pa a
atm
.
− 0 00576
=
−
(
)( .
))(
)
( .
1
8 3
298
25
0 043
mol
J/(K mol
K
L
Lm o l
− −
−
−
−
⎛
⎝
⎜ ⎜
⎞
⎠
⎟
1
2
1
2
1
3 60
1
25
)(
)
.
mol
L atm mol
mol
L ⎟ ⎟
2
P
nRT
V nb
a
n
V
= −
−
⎛
⎝
⎜ ⎜
⎞
⎠
⎟ ⎟
2
440
ANSWERS TO PROBLEMS
9781405124362_5_end.qxd 4/29/08 9:17 Page 440