Equilibria

Question 1

Define dynamic equilibrium

Answer 1

The rate of reactions (forwards and backwards) are equal and therefore concentrations of reactants and products are equal.

Question 2

Define homogeneous equilibrium

Answer 2

Reactants and products are in the same physical state

Question 3

What factors affect equilibrium?

Answer 3

Temperature, pressure (gas only), concentration (solution only), presence of a catalyst

Question 4

What is the Kc equation?

Answer 4

Kc = ([C]^n x [D]^n) / ([A]^n x [B]^n)

Question 5

What is the Kp equation?

Answer 5

Kp = (pC^c x pD^d) / (pA^a x pB^b)

Question 6

What is the mole fraction equation?

Answer 6

Number of moles of a particular gas / total moles of all gases in mixture

Question 7

What is the equation for partial pressure?

Answer 7

Mole fraction x total pressure

Question 8

Define partial pressure

Answer 8

Pressure exerted by a particular gas in a mixture in a closed system

Question 9

Define total pressure

Answer 9

Sum of all partial pressures

Question 10

When is the reaction quotient the same as the equilibrium constant?

Answer 10

Only at equilibrium

Question 11

What is Le Chatalier’s principle?

Answer 11

System reacts to oppose the change