Equilbria

Question 1

What is homogenous equilibria

Answer 1

Reactants and products in same state

Question 2

Le chataliers principle only works in

Answer 2

Homogenous equilibria

Question 3

What is Kc

Answer 3

Equilibrium constant

Question 4

Kc can be worked out from …

Answer 4

Molar concentration in a reaction

Question 5

Kc =

Answer 5

Products
————-
Reactants

Question 6

The molar values in front of each species are the …

Answer 6

Powers in the Kc expression

Question 7

Kc expression for 2A + B <~> 2C + D

Answer 7

Kc= [C]^2[D]
————-
[A]^2[B]

Question 8

[ ] means ..

Answer 8

Concentration of …

Question 9

What acronym helps to work our conc of species before working out Kc

Answer 9

ICE
I - initial moles
C - change ij. Moles
E - equilibrium moles

Question 10

Moles of products at start of reaction

Answer 10

Always 0

Question 11

What affects value of KC

Answer 11

Temperature
Concentration
Catalysts

Question 12

If temp change equilibrium to shift right kc will _____

Answer 12

Increase

Question 13

If temp change causes equilibrium to shift left Kc will _____

Answer 13

Decrease

Question 14

Change in conc leads to kc beinf

Answer 14

Unaffected

Question 15

Catalysts effect on kc

Answer 15

No effect on kc value
Catalysts speeds up rate of forward and backward reaction so speeds up the rate at which equilibrium is established

Question 16

catalyst effect on yield

Answer 16

. Catalyst has no effect on yield
3b. Adding a catalyst allows a lower temperature to be used
3c. So, this lowers the cost
by speeding up rates of forward and backward equally