A chemical engineer is studying the following reaction: HCN(aq)+NH3(aq) → CN (aq)+NH (aq) At the temperature the engineer picks, the equilibrium constant K¸ for this reaction is 0.80. The engineer charges ("fills") four reaction vessels with hydrogen cyanide and ammonia, and lets the reaction begin. She then measures the composition of the mixture inside each vessel from time to time. Her first set of measurements are shown in the table below. Predict the changes in the compositions the engineer should expect next time she measures the compositions. reaction vessel expected change in concentration compound concentration HCN 0.94 M O t increase O ! decrease O (no change) NH3 1.06 M O t increase O I decrease O (no change) A CN 0.15 M O tincrease O I decrease O (no change) NH, 0.09 M O t increase O I decrease O (no change) HCN 0.16 M O t increase O I decrease O (no change) NH, 0.28 M O t increase O I decrease O (no change) B CN 0.93 M O t increase O I decrease O (no change) NH, 0.87 M O t increase O I decrease O (no change) HCN 0.67 M O t increase O I decrease O (no change) NH3 0.82 M O tincrease O ! decrease O (no change) CN 0.70 M O t increase O I decrease O (no change) NH, 0.63 M O t increase O I decrease O (no change) o oo o
A chemical engineer is studying the following reaction: HCN(aq)+NH3(aq) → CN (aq)+NH (aq) At the temperature the engineer picks, the equilibrium constant K¸ for this reaction is 0.80. The engineer charges ("fills") four reaction vessels with hydrogen cyanide and ammonia, and lets the reaction begin. She then measures the composition of the mixture inside each vessel from time to time. Her first set of measurements are shown in the table below. Predict the changes in the compositions the engineer should expect next time she measures the compositions. reaction vessel expected change in concentration compound concentration HCN 0.94 M O t increase O ! decrease O (no change) NH3 1.06 M O t increase O I decrease O (no change) A CN 0.15 M O tincrease O I decrease O (no change) NH, 0.09 M O t increase O I decrease O (no change) HCN 0.16 M O t increase O I decrease O (no change) NH, 0.28 M O t increase O I decrease O (no change) B CN 0.93 M O t increase O I decrease O (no change) NH, 0.87 M O t increase O I decrease O (no change) HCN 0.67 M O t increase O I decrease O (no change) NH3 0.82 M O tincrease O ! decrease O (no change) CN 0.70 M O t increase O I decrease O (no change) NH, 0.63 M O t increase O I decrease O (no change) o oo o
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter12: Chemical Equilibrium
Section: Chapter Questions
Problem 12.101PAE: 12.101 An engineer working on a design to extract petroleum from a deep thermal reservoir wishes to...
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Transcribed Image Text:A chemical engineer is studying the following reaction:
HCN(aq)+NH 3(aq)
CN (aq)+NH (aq)
At the temperature the engineer picks, the equilibrium constant K, for this reaction is 0.80.
The engineer charges ("fills") four reaction vessels with hydrogen cyanide and ammonia, and lets the reaction begin. She then measures the composition of the
mixture inside each vessel from time to time. Her first set of measurements are shown in the table below.
Predict the changes in the compositions the engineer should expect next time she measures the compositions.
reaction
compound
concentration
expected change in concentration
vessel
HCN
0.94 M
O f increase
I decrease
(no change)
NH3
1.06 M
O f increase
O I decrease
O (no change)
A
CN
0.15 M
O f increase
O I decrease
O (no change)
NH4
0.09 M
O f increase
I decrease
(no change)
HCN
0.16 M
O f increase
O I decrease
(no change)
NH,
0.28 M
O f increase
O I decrease
(no change)
В
CN
0.93 M
O f increase
O I decrease
O (no change)
NH4
0.87 M
O f increase
I decrease
(no change)
HCN
0.67 M
f increase
I decrease
(no change)
NH3
0.82 M
O f increase
O I decrease
(no change)
CN
0.70 M
O f increase
O I decrease
O (no change)
NH,
0.63 M
O t increase
O I decrease
(no change)
?
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