The reaction SO2(g)+2H2S(g) ⇌ 3 S(s)+2H2O(g) is the basis of a suggested method for removal of SO2, a pollutant that…
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Question “The reaction SO2(g)+2H2S(g) ⇌ 3 S(s)+2H2O(g) is the basis of a suggested method for removal of SO2, a pollutant that…”
The reaction
SO2(g)+2H2S(g) ⇌ 3 S(s)+2H2O(g)
is the basis of a suggested method for removal of SO2, a
pollutant that irritates airways causing coughing, from power-plant
stack gases.
The values below may be helpful when answering questions about
the process.
Substance | ΔG∘f (kJ/mol) | ΔH∘f (kJ/mol) |
H2O(g) | −228.6 | −241.8 |
H2O(l) | −237.1 | −285.8 |
SO2(g) | −300.4 | −296.9 |
SO3(g) | −370.4 | −395.2 |
H2S(g) | −33.01 | −20.17 |
S(s) | 0 | 0 |
PART A:
Calculate the equilibrium constant Kp for the reaction
at a temperature of 298 K.
Express the equilibrium constant to one significant figure.
PART B:
In principle, is this reaction a feasible method of removing SO2
from power-plant emissions?
No; the reaction is highly spontaneous at 298 K, but a significant amount of SO2 will remain at equilibrium. |
Yes; the reaction is highly spontaneous at 298 K, even though a significant amount of SO2will remain at equilibrium. |
Yes; the reaction is highly spontaneous at 298 K and almost no SO2 will remain at equilibrium. |
No; the reaction is not spontaneous at 298 K, even though almost no SO2 will remain at equilibrium. |
No; the reaction is not spontaneous at 298 K and a significant amount of SO2 will remain at equilibrium. |
PART C:
Assume that the partial pressure of sulfur dioxide,
PSO2, is equal to the partial pressure of dihydrogen
sulfide, PH2S, and therefore PSO2=PH2S.
If the vapor pressure of water is 28 torr , calculate the
equilibrium partial pressure of SO2 (PSO2) in
the system at 298 K.
Express the pressure in atmospheres to two significant
figures.
PART D
Using Le Châtelier’s principle, determine how the process is
affected after each of the following temperature or pressure
changes. Consider that a more effective reaction produces more
product or more product in a shorter amount of time.
Drag the appropriate items to their respective categories: More
effective, Less effective, Equally effective
-Pressure decreases by increasing the container size. -Pressure increases by decreasing the container size. -Temperature increases while maintaining the container size. -Temperature decreases while maintaining the container size. |
Answer
Conclusion
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