CHEM 1110 - Test 2 - Fall 2004 Page 1
Circle your selection of the correct answer on the answer sheet provided.
Some useful information:
( )
P
an
VV bn nRT
+
− =
2
2
v
v
m
m
1
2
2
1
=
N
A
= 6.022 × 10
23
mol
-1
R = 0.08206 L atm K
-1
mol
-1
V
STP
= 22.4 L mol
-1
T/K = t
°C
/°C + 273.15
Temperature in °C versus Water Vapor Pressure in torr
0°C 4.6 torr 10°C 9.2 torr 20°C 17.5 torr
1°C 4.9 torr 11°C 9.8 torr 21°C 18.7 torr
2°C 5.3 torr 12°C 10.5 torr 22°C 19.8 torr
3°C 5.7 torr 13°C 11.2 torr 23°C 21.1 torr
4°C 6.1 torr 14°C 12.0 torr 24°C 22.4 torr
5°C 6.5 torr 15°C 12.8 torr 25°C 23.8 torr
6°C 7.0 torr 16°C 13.6 torr 26°C 25.2 torr
7°C 7.5 torr 17°C 14.5 torr 27°C 26.7 torr
8°C 8.0 torr 18°C 15.5 torr 28°C 28.3 torr
9°C 8.6 torr 19°C 16.5 torr 29°C 30.0 torr
1) Calculate the pressure of CO
2
produced from the following reaction if 10.0 atm of C
2
H
4
is
reacted with sufficient O
2
at 500°C in a closed volume and the resultant temperature is
750°C. C
2
H
4
+ 3O
2
!
2CO
2
+ 2H
2
O
A 15.0 atm B 30.0 atm C 26.5 atm D 13.3 atm E 6.63 atm
2) Calculate the volume of NH
3
produced at 300°C and 0.145 atm from the reaction of 350 g of
H
2
with an excess of N
2
according to the reaction:
N
2
+ 3H
2
!
2NH
3
A 4.05 × 10
3
L B 1.13 × 10
5
L C 8.11 × 10
3
L D 3.75 × 10
4
L E 5.63 × 10
4
L
3) An ideal gas is contained in a variable volume container. Initially the volume is 25.0 qt at
850 torr and 35°C. The temperature is raised to 200°C and the pressure adjusted to 1200 torr
by adjusting the volume. What volume was the container adjusted to?
A 50.5 qt. B 27.2 qt. C 11.5 qt. D 101 qt. E 3.10 qt.
