19, 20, 21, and 22 please show how you came to that answer 19. Consider the foll

Question

19, 20, 21, and 22
please show how you came to that answer

19. Consider the following reaction: A(g)+2Bg) 20)+D) A and B, 1.50 mol each, are placed in a 5.0 liter coetainer. Aßer equilibrium has been established, 0 50 mol of Dis present in the container Calculate the equilibrium constant, K.. for this reaction A. 1.00 B. 0.15 C. 0.33 D. 3.0 E none of these 20. Which of the following actions changes the value of the qquilibrium constant for the reaction HXg) + ls(g) e2g E. changing the temperature 21. For the following reactions occurring at s0o K, arange them in order of increasing tendency to procted to completion A adding more H D. using an enzyme B. removing some HI C using a catalyst (least

Explanation / Answer

19.

with D = 0.5 mol

equilibrium concentrations for,

[A] = (1.5 - 0.5) mol/5 L = 0.2 M

[B] = (1.5 - 1.0) mol/5 L = 0.1 M

[C] = 1.0 mol/5 L = 0.2 M

[D] = 0.5 mol/5 L = 0.1 M

Equilibrium constant K = [C][D]/[A][B] = (0.2 x 0.1)/(0.2 x 0.1) = 1.0

So the answer would be,

A. 1.00

20. The factor that would change the equilibrium constant for the reaction is,

E. changing the temperature

K depends on temperature and is independent of concentrations.

21. The tendency of reaction to proceed to completion has the folowing order,

C. 2 < 3 < 1

Higher the Kp greater would be the tendency for competion.

22. The equilibrium concentration of Cl2 and I2 would be,

A. 1.0 x 10^-2 M

2ICl ---> I2 + Cl2

initial [ICl] = 1 mol/1 L = 1 M

let x be the change at equilibrium,

Kp = 1 x 10^-4 = x^2/(1 - x)

x^2 + 2 x 10^-4x - 1 x 10^-4 = 0

x = 1.0 x 10^-2 M

So, [I2] = [Cl2] = 1 x 10^-2 at equilibrium

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