E-1 Qualitative Equilibrium

Question 1

When a system is at equilibrium, how do the rates of the forward reaction and reverse reaction compare?

Answer 1

They are the same

Question 2

At what time does this system reach at equilibrium?

Answer 2

Appoximately 5 seconds

Question 3

At what time does this system reach at equilibrium?

Answer 3

Appoximately 4 seconds

Question 4

Is the value for K for this reactions > 1 or < 1

Answer 4

More products than reactants so > 1

Question 5

Is the value for K for this reactions > 1 or < 1

Answer 5

More reactants than products so < 1

Question 6

Right, Left, or No Impact

2 A (g) + B (g) ⇔ A₂B (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if A₂B is removed from the system?

Answer 6

Right

Question 7

Right, Left, or No Impact

2 A (g) + B (g) ⇔ A₂B (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if A₂B is added to the system?

Answer 7

Left

Question 8

Right, Left, or No Impact

2 A (g) + B (g) ⇔ A₂B (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if A is added to the system?

Answer 8

right

Question 9

Right, Left, or No Impact

2 A (g) + B (g) ⇔ A₂B (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if B is removed from the system?

Answer 9

left

Question 10

Right, Left, or No Impact

2 M (s) + N (g) ⇔ M₂N (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if some M is added to the system?

Answer 10

No Impact - M is a solid

Question 11

Right, Left, or No Impact

2 M (s) + N (g) ⇔ M₂N (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if some M is removed from the system?

Answer 11

No Impact - M is a solid

Question 12

Right, Left, or No Impact

2 A (g) + B (g) ⇔ A₂B (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if the volume of the contained is decreased?

Answer 12

right

Question 13

Right, Left, or No Impact

2 A (g) + B (g) ⇔ A₂B (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if the volume of the container is increased?

Answer 13

left

Question 14

Right, Left, or No Impact

2 A (g) + B (g) ⇔ A₂B (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if Neon is added to the container?

Answer 14

No Impact

Question 15

Right, Left, or No Impact

X₂ (g) + Y₂ (g) + heat ⇔ 2 XY (g)

The above reaction is at equilibrium. Which way will the reaction shift if the volume of the container is increased?

Answer 15

No Impact

Question 16

Right, Left, or No Impact

X₂ (g) + Y₂ (g) + heat ⇔ 2 XY (g)

The above reaction is at equilibrium. Which way will the reaction shift if the volume of the container is decreased?

Answer 16

No Impact

Question 17

Right, Left, or No Impact

X₂ (g) + Y₂ (g) + heat ⇔ 2 XY (g)

The above reaction is at equilibrium. Which way will the reaction shift if Argon is added to the container?

Answer 17

No Impact

Question 18

Right, Left, or No Impact

2 M (s) + N (g) ⇔ M₂N (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if the volume of the container is decreased?

Answer 18

No Impact - M is a solid and there is no change in n for the gases.

Question 19

Right, Left, or No Impact

2 M (s) + N (g) ⇔ M₂N (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if the volume of the container is increased?

Answer 19

No Impact - M is a solid and there is no change in n for the gases.

Question 20

Right, Left, or No Impact

X₂ (g) + Y₂ (g) + heat ⇔ 2 XY (g)

The above reaction is at equilibrium on a hot plate. Which way will the reaction shift if the the hot plate is turned up?

Answer 20

right

Question 21

Right, Left, or No Impact

X₂ (g) + Y₂ (g) + heat ⇔ 2 XY (g)

The above reaction is at equilibrium on a hot plate. Which way will the reaction shift if the the hot plate is turned down?

Answer 21

left

Question 22

Right, Left, or No Impact

2 A (g) + B (g) ⇔ A₂B (g) + heat

The above reaction is at equilibrium on a hot plate. Which way will the reaction shift if the hot plate is turned up?

Answer 22

left

Question 23

Right, Left, or No Impact

2 A (g) + B (g) ⇔ A₂B (g) + heat

The above reaction is at equilibrium on a hot plate. Which way will the reaction shift if the hot plate is turned down?

Answer 23

right

Question 24

Right, Left, or No Impact

2 A (g) + B (g) ⇔ A₂B (g) + heat

The above reaction is at equilibrium. Which way will the reaction shift if a catalyst is added to the container?

Answer 24

No Impact

Question 25

Left, Right, No Impact

Which way will a reaction shift if Q > K?

Answer 25

left

Question 26

Left, Right, No Impact

Which way will a reaction shift if Q < K?

Answer 26

right

Question 27

During what time frame (or not at all) is Q < K for this reaction?

Answer 27

0 to 5 seconds

Question 28

During what time frame (or not at all) is Q > K?

Answer 28

Q is less than K for the first 4 seconds but is not greater than K according to this data

Question 29

Write out the Law of Mass Action for the following reaction?

2 A (g) + B (g) ⇔ A₂B (g) + heat

Answer 29

K = [A₂B] / [A]²[B]

Question 30

Write out the Law of Mass Action for the following reaction?

2 M (s) + N (g) ⇔ M₂N (g) + heat

Answer 30

K = [M₂N] / [N]; M is a solid

Question 31

Write out the Law of Mass Action for the following reaction?

X₂ (g) + Y₂ (g) + heat ⇔ 2 XY (g)

Answer 31

K = [XY]² / [X₂][Y₂]