At a particular temperature, 12.0 moles of so3 is placed into a 3.0-l rigid container, and the so3 dissociates by the reaction 2so3(g) 34 2so2(g) 1 o2(g) at equilibrium, 3.0 moles of so2 is present. calculate k for this reaction.
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Ответ:
I 12 0 0
C -2x +2x +x
E 12-2x 2x x
Since the moles of SO₂ at equilibrium is 3 mol, 2x = 3. Then, x = 1.5 mol. So, the amounts at equilibrium is:
SO₃: 12 - 2(1.5) = 9
SO₂: 2(1.5) = 3
O₂: 1.5
The formula for K basing on the stoichiometric reaction is:
K = [SO₂]²[O₂]/[SO₃]²
where the unit used is conc in mol/L.
K = [3 mol/3 L]²[1.5 mol/3 L]/[9 mol/3 L]²
K = 0.0556
Ответ:
The value of k for the reaction is 0.055.
In the reaction, the
dissociate to form
and
.
2 moles of sulfur trioxide will form 2 moles of sulfur dioxide and 1 mole of oxygen.
According to the ICE setup :
4 0 0 I
-2x +2x x C
1 E
Since there were 3 moles of
at the equilibrium.
2x = 3 moles.
x = 1.5 moles.
The initial amount of
= 12 moles
At equilibrium, there has been a 2x reduction.
The amount of
= 12 - 2x
= 12 - 3
= 9 moles.
The amount of
at equilibrium is 2x
= 3 moles.
The amount of
at equilibrium is x.
= 1.5 moles.
k can be calculated as:![\rm \dfrac{[SO_2]^2\;[O_2]}{[SO_3]^2}](/tpl/images/0156/4205/3de93.png)
k =![\rm \dfrac{[3\;moles/\;3\;L]^2\;[1.5\;moles\;/\;3\;L]}{[9\;moles\;/3\;L]^2}](/tpl/images/0156/4205/76bb9.png)
k = 0.055.
The value of k for the reaction is 0.055.
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Ответ: