Question

consider the reaction h₂(g) + i₂(g) ⇌ 2hi(g). what is the reaction quotient, q, for this system when h₂ = 0.100 m, i₂ = 0.200 m, and hi = 3.50 m?

Explanation:

Step1: Escribir la expresión para \( Q \)

Para la reacción \( aA + bB
ightleftharpoons cC + dD \), \( Q=\frac{[C]^c[D]^d}{[A]^a[B]^b} \). Para \( H_2(g)+I_2(g)
ightleftharpoons 2HI(g) \), \( Q = \frac{[HI]^2}{[H_2][I_2]} \)

Step2: Sustituir los valores de concentración

Dados \( [H_2]=0.100\ M \), \( [I_2]=0.200\ M \) y \( [HI] = 3.50\ M \), sustituimos en la fórmula de \( Q \):

\( Q=\frac{(3.50)^2}{(0.100)(0.200)} \)

Step3: Calcular \( Q \)

\( (3.50)^2=12.25 \), \( (0.100)(0.200)=0.02 \)

\( Q=\frac{12.25}{0.02}=612.5\approx613 \)

Answer:

613