Chemical EquilibriumHard
Question
N2O4(g) ⇋ 2NO2(g), Kc = 4. This reversible reaction is studied graphically as shown in figure. Select the correct statements out of I, II and III.
I : Reaction quotient has maximum value at point A
II : Reaction proceeds left to right at a point when
[N2O4] = [NO2] = 0.1 M
III : Kc = Q when point D or F is reached :
I : Reaction quotient has maximum value at point A
II : Reaction proceeds left to right at a point when
[N2O4] = [NO2] = 0.1 M
III : Kc = Q when point D or F is reached :
Options
A.I, II
B.II, III
C.I, III
D.I, II, III
Solution
(I) N2O4 2NO2 ⇋ Kc = 4
at point − A
Q =
= 0
So, Q have minimum value at point A.
(II) at point [N2O4] = [No2] = 0.1m
Q =
Q < Kc
So, reaction proceeds left to right
(III) Kc = Q at point [D & F].
at point − A
Q =
= 0So, Q have minimum value at point A.
(II) at point [N2O4] = [No2] = 0.1m
Q =
Q < Kc
So, reaction proceeds left to right
(III) Kc = Q at point [D & F].
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