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, pro-
teins, 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
345
1001
p()
.
.
Oxygen.
mol
mol
==atm atm
0 725
345
1021
p()
.
.
Nitrogen.
mol
mol
==atm atm
269
345
1078
n().
.
Argon.
g
gmol
==0 013 − mol
100
39 9
1 0 033
n().
.
Oxygen.
g
gmol
==0 232 − mol
100
32 0
1 0 725
n().
.
Nitrogen.
g
gmol
==0 755 − mol
100
28 0
1 269
V
T
V
T
initial TT
initial
nal
nal
=→=nal in
3
3
3 iitial
nal
initial
V
V
⎛ 3
⎝
⎜⎜
⎞
⎠
⎟⎟=()
.
.
298
09
1
K
L
00
283
L
K
⎛
⎝
⎜⎜
⎞
⎠
⎟⎟=
n
PV
RT
()()
(.
==
× −
12
821 10^2
atm L
L atm/(K mol)))( )
.
283
0 086
K
= mol
P
nRT
V
(. )(. ))( )
==
×
01 831 298
10
mol J/(K mol K
.
10
− 33 =24 8
m
kPa
P
.
..
=
×
×
− ×
2448 5
24 96 10
1
(^33) 101 10 5
J
m
atm
Paa
−0 00576atm.
=
−
( )(. ))( )
(.
1 8 3 298
25 0 043
mol J/(K mol K
LLmol−−
− −−⎛
⎝
⎜⎜
⎞
⎠
1 21 2 ⎟
1
360
1
)( ) 25
.
mol
Latm mol
mol
L⎟⎟
2
P
nRT
Vnb
a
n
V
=
−
−
⎛
⎝
⎜⎜
⎞
⎠
⎟⎟
2
440 ANSWERS TO PROBLEMS
9781405124362_5_end.qxd 4/29/08 9:17 Page 440