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Mass action ratio or reaction quotient Q...

Mass action ratio or reaction quotient Q for a reaction can be calculated using the law of mass action `A(g)+B(g) harr C(g) + D(g) Q=([C][D])/([A][B])`. The value of Q decides whether the reaction is at equilibrium or not. At equilibrium, Q = K. For non equilibrium process, `Q ne K`. When `Q gt K`, reaction will favour backward direction and when `Q lt K`, it will favour forward direction.
For the reaction : `2A + B harr 3C` at 298 K, `K_c = 49`
A 3L vessel contains 2,1 and 3 moles of A, B and C respectively. The reaction at the same temperature:

A

must proceed in forward direction

B

must proceed in backward direction

C

must be in equilibrium

D

cannot be predicted

Text Solution

Verified by Experts

The correct Answer is:
A
`Q_(C)=([C]^(3))/([A]^(2) xx [B])=((3//3)^(3))/((2//3)^(2) xx (1//3))=(27)/(4) lt K_(C)`
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