Answer to Question #177077 in Inorganic Chemistry for dsad

Question

3) 2A(g)+B(g)⇄2C(g) 

Each with a concentration of 0.0100M . The following table shows the concentrations of the gases at equilibrium at a particular temperature.

[A]eq --> 0.01800

[B]eq-> 01400

[C]eq--> .0020

If the experiment is repeated at a higher temperature at which Kc is smaller, which of the following best describes the effect of the temperature change on the concentrations of the gases at equilibrium?

A)There will be a decrease in [A]_eq that will be two times the decrease in [B]_eq because A and B react in a 2-to-1 ratio.

B) [A]_eq and [B]_eq will remain constant, but [C]_eq will increase because Kc decreased.

C) [A]_eq , [B]_eq , and [C]_eq will all increase because Kc decreased.

D)There will be a increase in [A]_eq that will be two times the decrease in [B]_eq because A and B react in a 2-to-1 ratio.

Answer 1

If Kc got smaller, then the equilibrium must shift to the reagents. This means that C will decrease and both A and B will increase. The increase in A would be two times the increase of B because they react in 2-to-1-ratio. None of the above answers are right.