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This quiz focuses on AP Chemistry Enduring understanding: "Chemical equilibrium is a dynamic, reversible state in which rates of opposing processes are equal", and Enduring understanding: "Systems at equilibrium are responsive to external perturbations, with the response leading to a change in the composition of the system."
What would the equation for the reaction quotient Q be for the following reaction:
C(s) + H2O(g) ⇆ H2(g) + CO(g)
Q = [H2][CO]/[H2O][C]
Q = [H2O]/[H2][CO]
Q = [H2][CO]/[H2O]
Q = [H2][CO]/[H2O][C]
Consider the reaction A(g) + B(g) ⇆ C(g), with K=5 at 0 degree C.
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Samples 2
Samples 1, 2, and 4
Samples 2 and 4
Samples 1
The reaction A(g) + B(g) ⇆ C(g) is at equilibrium with K=5 at 0 oC. Which of the following statements about the system is correct?
The pressure of the system at constant volume will be steadily decreasing
A, B, and C are all present and the reaction is constantly occurring in both the forward and reverse directions.
The equilibrium constant will remain the same even if the temperature and pressure of the system are changed.
No further reaction of A + B to C is occurring
In the reaction 2 NO2(g) ⇆ N2O4 (g). A rigid container is pressurized with 5.0 atm N2O4, then allowed to come to equilibrium with a final partial pressure of 4.0 atm N2O4. What is Kp?
1
2
5
10
For the gas phase reaction H2 + I2 ⇆ 2HI, with Kp = 25, what is the final partial pressure of HI at equilibrium, if the initial pressure of H2, I2, and HI was 1.0 atm.
2atm
2.09atm
2.14atm
3atm
For the reaction...
SO2 + O2 <−> SO3
If the equilibrium shifts to the right, the concentration of O2 will ___________.
Remains same
Decreases
Doubles
Halves
At what time (in seconds) is the equilibrium established?
6
7
10
12
For the reaction...
heat + N2 + O2 <−> 2NO
If the heat is removed from the chemical system, the equilibrium will shift _______.
both left and right
Right
Left
Neither left nor right
