Consider the reaction 2SO2(g)+O2(g)⇌2SO3(g) for which Kc=278M−1. 0.001 mole of each of the reagents SO2(g), O2(g) and SO3(g) are mixed in a 1.0 L flask. Determine the reaction quotient of the system and spontaneous direction of the system.
Qc=1000; the equilibrium shifts to the left
Qc=1000; the equilibrium shifts to the right
Qc=0.001; the equilibrium shifts to the right
Qc=0.001; the equilibrium shifts to the left
A
Qc=0.001; the equilibrium shifts to the left
B
Qc=1000; the equilibrium shifts to the right
C
Qc=1000; the equilibrium shifts to the left
D
Qc=0.001; the equilibrium shifts to the right
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Solution
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2SO2(g)+O2(g)⇌2SO3(g)
Q=[SO3]2[SO2]2[O2]
Q=(0.001)2(0.001)2(0.001)
Q=10.001
Qc=1000
Qc>Kc
Thus, reaction shifts in backward direction i.e. towards left.
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