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Topic 9 – Kinetics and Equilibrium
20. Le Chatelier’s Principle – Changing pressure: Determining effect on reaction
1. Given the reaction at equilibrium
H2(g) + Cl2(g) <========== > 2HCl(g)
As pressure is increased at constant temperature, the concentration of HCl
1) Decreases 2) Increases 3) Remains the same
2. The reaction below is at equilibrium
A(g) + 2B2(g) + heat < ========== > AB2(g)
As pressure is increased at constant temperature, the rate of reverse reaction will
1) Increase 2) Decrease 3) Remains the same
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Teacher Preview Copy
3. Given the equation of a reaction at equilibrium
2CO(g) + O2 < ----------- > 2CO2(g)
If pressure is increased on this reaction, the rate of forward reaction will
1) Decrease, and the concentration of CO2 will also decrease
2) Decrease, and the concentration of CO2 will increase
3) Increase, and the concentration of CO2 will decrease
4) Increase, and the concentration of CO2 will also increase
4. Given the reaction below at equilibrium
W(g) + 3X(g) < ------------ > 2Y(g) + 3Z(g)
An increase in pressure at constant temperature will shift the equilibrium to the
1) Left, and the concentration of W(g) will increase
2) Left, and the concentration of W(g) will decrease
3) Right, and the concentration of W(g) will increase
4) Right, and the concentration of W(g) will decrease
5. Given the system at equilibrium
2Hg(l) + O2(g) < ========== > 2HgO(s)
Increasing pressure in this reaction will cause
1) An increase in the concentration of Hg
2) An increase in the rate of the reverse reaction
3) A shift in equilibrium point to right
4) A decrease in the rate of forward reaction
6. Given the reaction at equilibrium
2AB(g) < -------------- > A2(g) + B2(g)
As pressure is increased on this reaction
1) The rate of forward reaction will be greater than the rate of the reverse reaction
2) The rate of reverse reaction will be greater than the rate of the forward reaction
3) There will be a shift of equilibrium point to the left
4) There will be no shift in equilibrium point
286 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
Topic 9 – Kinetics and Equilibrium
20. Le Chatelier’s Principle – Changing pressure: Determining effect on reaction
1. Given the reaction at equilibrium
H2(g) + Cl2(g) <========== > 2HCl(g)
As pressure is increased at constant temperature, the concentration of HCl
1) Decreases 2) Increases 3) Remains the same
2. The reaction below is at equilibrium
A(g) + 2B2(g) + heat < ========== > AB2(g)
As pressure is increased at constant temperature, the rate of reverse reaction will
1) Increase 2) Decrease 3) Remains the same
Teacher Preview Copy
Teacher Preview Copy
3. Given the equation of a reaction at equilibrium
2CO(g) + O2 < ----------- > 2CO2(g)
If pressure is increased on this reaction, the rate of forward reaction will
1) Decrease, and the concentration of CO2 will also decrease
2) Decrease, and the concentration of CO2 will increase
3) Increase, and the concentration of CO2 will decrease
4) Increase, and the concentration of CO2 will also increase
4. Given the reaction below at equilibrium
W(g) + 3X(g) < ------------ > 2Y(g) + 3Z(g)
An increase in pressure at constant temperature will shift the equilibrium to the
1) Left, and the concentration of W(g) will increase
2) Left, and the concentration of W(g) will decrease
3) Right, and the concentration of W(g) will increase
4) Right, and the concentration of W(g) will decrease
5. Given the system at equilibrium
2Hg(l) + O2(g) < ========== > 2HgO(s)
Increasing pressure in this reaction will cause
1) An increase in the concentration of Hg
2) An increase in the rate of the reverse reaction
3) A shift in equilibrium point to right
4) A decrease in the rate of forward reaction
6. Given the reaction at equilibrium
2AB(g) < -------------- > A2(g) + B2(g)
As pressure is increased on this reaction
1) The rate of forward reaction will be greater than the rate of the reverse reaction
2) The rate of reverse reaction will be greater than the rate of the forward reaction
3) There will be a shift of equilibrium point to the left
4) There will be no shift in equilibrium point
286 Copyright © 2010 E3 Scholastic Publishing. All Rights Reserved. Survivingchem.com
