BioPHYSICAL chemistry

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

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