Gases Chemistry Worksheet - Chapter 13, An Introduction To Chemistry Page 45

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527
Chapter Problems
94. The carbon tetrachloride made in the the process described in the previous
O
19
bjeCtive
problem can be used to make CFC-12, CF
Cl
, and CFC-11, CFCl
:
2
2
3
3HF(g) + 2CCl
(g) → CF
(g) + CFCl
(g) + 3HCl(g)
Cl
4
2
2
3
a. What is the minimum volume of HF(g) in cubic meters at 1.2 atm and
19 °C that would be necessary to react 235 kg CCl
in this reaction?
4
b. What is the maximum volume of CFC-12 at 764 mmHg and 18 °C that
3
can be formed from 724 m
of hydrogen fluoride gas at 1397 mmHg and
27 °C?
95.
Ethylene oxide, C
H
O, is a cyclic compound whose two carbon atoms and
O
19
bjeCtive
2
4
oxygen atom form a 3-membered ring. The small ring is somewhat unstable,
so ethylene oxide is a very reactive substance. It is useful as a rocket propellant,
to sterilize medical plastic tubing, and to make polyesters and antifreeze. It is
, with oxygen at 270-290 °C and
formed from the reaction of ethylene, CH
CH
2
2
8-20 atm in the presence of a silver catalyst.
(g) + O
(g) → 2C
2CH
CH
H
O(g)
2
2
2
2
4
a. What minimum mass in megagrams of liquefied ethylene, CH
CH
, is
2
2
necessary to form 2.0 × 10
5
3
m
of ethylene oxide, C
H
O, at 107 kPa and
2
4
298 K?
b. Ethylene can be purchased in cylinders containing 30 lb of liquefied
ethylene. Assuming complete conversion of ethylene to ethylene oxide,
how many of these cylinders would be necessary to make 2.0 × 10
5
3
m
of
ethylene oxide at 107 kPa and 298 K?
c. How many liters of ethylene oxide gas at 2.04 atm and 67 °C can be made
from 1.4 × 10
4
gas at 21 °C and 1.05 atm?
L of CH
CH
2
2
d. How many kilograms of liquefied ethylene oxide can be made from the
4
reaction of 1.4 × 10
gas 1.05 atm and 21 °C and
L of CH
CH
2
2
3
8.9 × 10
L of oxygen gas at 0.998 atm and 19 °C?
96. Methanol, CH
OH, a common solvent, is also used to make formaldehyde,
O
19
bjeCtive
3
acetic acid, and detergents. It is made from the methane in natural gas in two
steps, the second of which is run at 200-300 °C and 50-100 atm using metal
oxide catalysts:
(g) + 2H
O(g) + CO
(g) → 4CO(g) + 8H
3CH
(g)
4
2
2
2
CO(g) + 2H
(g) → CH
OH(l )
2
3
a. In the second reaction, how many megagrams of liquid methanol can be
3
of carbon monoxide, CO, at 2.0 × 10
3
produced from 187 m
kPa and
500 K?
b. In the second reaction, what is the minimum volume of H
gas at
2
4.0 × 10
3
3
kPa and 500 K necessary to convert 187 m
of CO gas at
2.0 × 10
3
kPa and 500 K?
c. How many megagrams of liquid methanol can be made from the reaction
3
3
3
of CO(g) at 2.0 × 10
of 187 m
kPa and 500 K and 159 m
of H
(g) at
2
3
4.0 × 10
kPa and 500 K?

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