Question

When conducting chemical reactions in the lab or in industrial processes, it can be important to know whether a reaction has reached equilibrium. By measuring the reaction quotient, Q, of a chemical reaction and comparing it to the equilibrium constant, K, we can identify whether a reaction is at equilibrium. For the reaction aA+bB⇌cC+dD the reaction quotient, Q, is given by the expression Q=[C]c[D]d[A]a[B]b under any conditions. The value of Q is equal to K only at equilibrium.

The following reaction was carried out in a 3.50 L reaction vessel at 1100 K: C(s)+H2O(g)⇌CO(g)+H2(g) If during the course of the reaction, the vessel is found to contain 9.00 mol of C, 13.3 mol of H2O, 3.60 mol of CO, and 7.90 mol of H2, what is the reaction quotient Q? Enter the reaction quotient numerically.

Answer 1

Answer:-

Explaination:-

The given reaction is

....(A)

The reaction quotient Q for equilibrium reaction (A) is given by

.....(1)

since [C] is omitted from denominator. Because 'C' is in solid state. The activity of solid and pure liquid is considerd to be one and hence it is functionally omitted from reaction quotient formula.

Given:-

moles of C = 9.0 mol  

moles of H₂O = 13.3 mol

moles of CO = 3.60 mol

moles of H₂ = 7.90 mol

Volume = 3.5 L

Now culculate Concentration of each reactant.

Formula :

1.

2.

3.

Therefore, from eq(1) we have,