Answer to Question #177075 in General Chemistry for faer

Question

1) More H₂ gas is added to the system at time t₂ while the temperature is held constant. Which of the following will most likely occur?

A)The value of the equilibrium constant will decrease

B) The amount of N₂ will increase

C) The amount of NH₃ will increase

D)The value of the equilibrium constant will increase

2) X(g) + Y(g) ⇄ 2Z(g)

When 6.00 mol each of X(g) and Y(g) are placed in a 1.00 L vessel and allowed to react at constant temperature according to the equation above, 8.00 mol of Z(g) is produced. What is the value of the equilibrium constant, Kc ?

A)36

B)16

C)2

D)8

Answer 1

1) The value of the equilibrium constant will decrease because the equilibrium constant is expressed in terms of pressure of H₂, and the pressure of H₂ is in the denominator.

2) 8 mol of Z(g) are in the vessel and 2 mol of both X(g) and Y(g) are left, so, calculate the constant:

$$K_c=\frac{[Z]^2}{[X][Y]}=\frac{8^2}{2·2}=16.$$