Question

Please answer ASAP THANKS

post Diagram (a) shows the reaction By(g)- 2ABig) at equilibrium at a certain temperature, where spheres represent A and the unshaded spheres represent B. If each sphere represents 0.020 mole and the volume of the container is 1.0 L, calculate the concentration of each species when the reaction in (b) reaches equilibrium

Answer 1

A2 (g)   +   B2 (g)    <-----------> 2 AB (g)

0.080        0.080                          0.040

Keq = [AB]^2 / [A2] [B2]

       = (0.040)^2 / (0.080)^2

Keq = 0.25

A2 (g)   +   B2 (g)    <-----------> 2 AB (g)

0.080        0.080                          0.040

0.08 -x       0.08 - x                       0.040 + 2x

At equilibrium :

0.040 + 2x = 0.1

x = 0.03

concentration of species :

[A2] = 0.050 M

[B2] = 0.050 M

[AB] = 0.10 M