What is Le Châtelier’s principle? Consider the reaction 2 NOCI ( g ) ⇌ 2 NO ( g ) + Cl 2 ( g ) If this reaction is at equilibrium. what happens when the following changes occur? a . NOCI( g ) is added. b . NO( g ) is added. c . NOCI( g ) is removed. d . Cl 2 ( g ) is removed. e . The container volume is decreased. For each of these changes, what happens to the value of K for the reaction as equilibrium is reached again? Give an example of a reaction for which the addition or removal of one of the reactants or products has no effect on the equilibrium position. In general, how will the equilibrium position of a gas-phase reaction be affected if the volume of the reaction vessel changes? Are there reactions that will not have their equilibria shifted by a change in volume? Explain. Why does changing the pressure in a rigid container by adding an inert gas not shift the equilibrium position for a gas-phase reaction?
What is Le Châtelier’s principle? Consider the reaction 2 NOCI ( g ) ⇌ 2 NO ( g ) + Cl 2 ( g ) If this reaction is at equilibrium. what happens when the following changes occur? a . NOCI( g ) is added. b . NO( g ) is added. c . NOCI( g ) is removed. d . Cl 2 ( g ) is removed. e . The container volume is decreased. For each of these changes, what happens to the value of K for the reaction as equilibrium is reached again? Give an example of a reaction for which the addition or removal of one of the reactants or products has no effect on the equilibrium position. In general, how will the equilibrium position of a gas-phase reaction be affected if the volume of the reaction vessel changes? Are there reactions that will not have their equilibria shifted by a change in volume? Explain. Why does changing the pressure in a rigid container by adding an inert gas not shift the equilibrium position for a gas-phase reaction?
Solution Summary: The author explains Le Chatelier's principle, which states that if there is a change in temperature, pressure or concentration of any system, the position of equilibrium will shift in the direction that overcomes that change.
What is Le Châtelier’s principle? Consider the reaction
2
NOCI
(
g
)
⇌
2
NO
(
g
)
+
Cl
2
(
g
)
If this reaction is at equilibrium. what happens when the following changes occur?
a. NOCI(g) is added.
b. NO(g) is added.
c. NOCI(g) is removed.
d. Cl2(g) is removed.
e. The container volume is decreased.
For each of these changes, what happens to the value of K for the reaction as equilibrium is reached again? Give an example of a reaction for which the addition or removal of one of the reactants or products has no effect on the equilibrium position.
In general, how will the equilibrium position of a gas-phase reaction be affected if the volume of the reaction vessel changes? Are there reactions that will not have their equilibria shifted by a change in volume? Explain. Why does changing the pressure in a rigid container by adding an inert gas not shift the equilibrium position for a gas-phase reaction?
How many signals do you expect in the H NMR spectrum for this molecule?
Br Br
Write the answer below.
Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H
atoms that would contribute to the same signal as the H already highlighted red
Note for advanced students: In this question, any multiplet is counted as one signal.
1
Number of signals in the 'H NMR spectrum.
For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to
the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
Check
For the molecule in the bottom drawing area, highlight in red any other H atoms that will contribute
to the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
O
✓
No additional Hs to color in top
molecule
ง
No additional Hs to color in bottom…
in the kinetics experiment, what were the values calculated? Select all that apply.a) equilibrium constantb) pHc) order of reactiond) rate contstant
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