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Sebastien Breau
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Midterm

# practice exam 2010.pdf

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McGill University

Chemistry

CHEM 110

Sebastien Breau

Fall

Description

DATA THAT YOU MAY USE
UNITS
Conventional S.I.
Volume mmLcor cm 3 = 3or 10 dm 3
m d ) L ( r e t i L 3
5
1.t1ss0r= atm × 10 Pa
tPrr33=3
Temperature °0 °C = 273.15 K
PV L-1a13=m × 10 dm Pa
=d01.3 3kPa
=J101.3
kg (J= c.l81rgy •m /s )
2 2 -7
cm g erg 1 /s = 10 J
Current C/samAp)e=e
CONSTANTS
Avoganuro’ser N 6.022 x 10 mol-1
-23 -1
Boltzmcans’ant k 1.381 x 10 J K
-1
Faracons’ant F 96 485 C mol
Values of R for various unit combinations
1.986 cal ol -K -1
-1 -1
0.08206 L3atm mol-1 -1
82.06 cm a-1 -1l K
8.314 J ol K
8.314 × 10 erg mol K-1
8.314 dm 3 kPa mol K-1
8.314 × 10 cm kPa mol K -1
Clausius-Claeyration:Qudatiula:
2
ax b+ + =
⎧ P ⎫ ΔH vap ⎛ 1 1 ⎞
ln⎨ 2 ⎬ = ⎜ − ⎟ − ± b2 − 4ac
P R ⎜ T T ⎟ x=
⎩ 1 ⎭ ⎝ 1 2⎠
2a
Inegrat:ArrEenutsion:
−E /RT
Order 0: [A] = [A]t 0 k eA = a
k 2 −E a ⎛⎞11
t - k ln = − ⎜⎟
Order 1: [A] = [A] 0 e 1 1 2 ⎝⎠
Order 2: 1/[A] = 1/[A] 0+ kt ΔG (nonstandard ditions): Van tHoff Equatn:n
o
K 2 −ΔH ⎛ 1 1 ⎞
ΔG = ΔG° + RT ln n Q ln = ⎜ − ⎟
K1 RT ⎝ 2 T1 ⎠
Common n Strong cids Common S Strong Bases
HCl LiOH Ca(OH) 2
HBr NaOH Sr(OH) 2
HI KOH Ba(OH) 2
HClO 4 RbOH
HNO 3 CsOH
H2SO 4 Mg(OH) 2
The PPeriodic Table of the Elem ments
1) Given the data below, determine the normal boiling point of COCl : P = 100 mm Hg, T = -
-1 2 1 1
35.6 °C, ΔH vap= 27.4 kJ mol
a) 5.0 °C
b) -65.1 °C
c) -5.0 °C
d) 278 °C
e) -36.4 °C
2) The vapor pressure of a liquid depends on
a) the chemical structure of the liquid.
b) the volume of the liquid.
c) the surface area of the liquid
d) the shape of the container.
e) none of these
3) The heat of fusion for napthalene (C 10H 8 is 18.98 kJ mol and for sodium is 2.60 kJ mol . -1
The amount of heat that would melt 37.0 grams of napthalene would melt how many grams
of sodium?
a) 48.4 g
b) 0.909 g
c) 28.3 g
d) 270. g
e) 1510 g
4) Adding a non-volatile solute such as NaCl to ice will cause it to melt by:
a) increasing both the rate of fusion and, to a lesser extent, the rate of solidification.
b) decreasing the rate of fusion.
c) increasing the rate of fusion.
d) decreasing the rate of solidification.
e) increasing the rate of solidification.
5) An ideal solution is formed between substances A & B when
a) A-A interactions are weak and B-B interactions are strong.
b) A-B interactions are weaker than A-A and B-B interactions.
c) A-B interactions are stronger than A-A and B-B interactions.
d) A-B interactions are equal in strength to both A-A and B-B interactions.
e) None of these.
6) The vapor pressures of pure hexane and pure heptane at 25 °C are 151.4 mmHg and 45.62
mmHg respectively. A solution contains 0.800 mol fraction hexane and 0.200 mol fraction
heptane. What is the composition of the vapor in equilibrium with this solution at 25 °C?
a) 77.0% hexane, 23.0% heptane
b) 45.0% hexane, 55.0% heptane
c) 50.0% hexane, 50.0% heptane
d) 80.0% hexane, 20.0% heptane

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