I) will have 1.2 mol of particles because
NaOH completely dissociates in water.
II) will have 1.4 mol of particles because
KCl completely dissociates in water.
III) will have 1.5 mol of particles because
Na
2
CO
3
completely dissociates in water.
IV) will have 1 mol of sugar in solution
because it is soluble but does not dissociate.
The higher the concentration, the greater
the boiling point elevation, so
IV
>
I
>
II
>
III
.
014(part1of3)10.0points
Consider the following pressure diagram for a
binary liquid containing A and B.

gamboa (gg8745) – Homework #2 – holcombe – (51160)
5
0
1
x
A
80 torr
40 torr
If 3 mol of A and 6 mol of B are mixed,
what is the vapor pressure of B?
1.
13 torr
2.
66 torr
3.
53 torr
correct
4.
80 torr
5.
40 torr
Explanation:
The mole fraction of A is
x
A
=
mol A
total mol
=
3 mol
3 mol + 6 mol
= 0
.
33
.
0
1
0
.
33
40 torr
53 torr
015(part2of3)10.0points
What is the corresponding vapor pressure of
A?
1.53 torr2.13 torrcorrect
3.66 torrAn unknown liquid has a vapor pressure of88 mmHg at 45◦C and a heat of vaporizationof 32 kJ/mol, what is its vapor pressure at55◦C?
5.
80 torr
Explanation:
0
1
0
.
33
40 torr
13 torr
016(part3of3)10.0points
What is the corresponding total vapor pres-
sure?
1.
80 torr
2.
40 torr
3.
66 torr
correct
4.
53 torr
5.
13 torr
Explanation:
0
1
0
.
33
40 torr
66 torr
017
10.0points
WITHDRAWN

gamboa (gg8745) – Homework #2 – holcombe – (51160)
6
1.
89
.
4 mmHg
2.
127 mmHg
correct
3.
156 mmHg
4.
61 mmHg
Explanation:
Use
the
Clausius-Clapeyron
Equation.
Here, the only thing we don’t know is
P
2
.
ln
parenleftbigg
P
parenrightbigg
R
parenleftbigg
1
parenrightbigg
ln
parenleftbigg
P
01910.0pointsA portion of two volatile liquids are pouredinto an evacuated container, filling the con-tainer halfway. The container is then sealed.After equilibrium is established, the measuredpressure is less than expected (negative devi-ation from Raoult’s Law). What is definitelyTRUE about the mixture?
020
10.0points
Two aqueous solutions are separated by a
semipermeable membrane.
Solution A = 0.34 M KCl
Solution B = 0.64 M KCl
Which of the following statements is TRUE?