Equilibrium

Question 1

Define Dynamic equilibrium

Answer 1

It’s a state of apparent repose where the forward and reverse reactions are going at equal speeds

Question 2

At equilibrium

Answer 2

1. The rate of the forward reaction is the same as the rate of the reverse reaction
2. Concentrations of the the reactants and products remain constant.
3. Macroscopic properties are constant

Question 3

How can you tell the reversibility of a chemical equation?

Answer 3

The reversibility of chemical reactions can be explained in terms of the activation energy of the for/rev reactions

Question 4

What is K?

Answer 4

K is the equilibrium constant which is calculated in mol L^-1. If K>10^3, Reaction strongly favours products. If K<10^-3, Reaction very strongly favours reactants

Question 5

Le French guys principle?

Answer 5

If a change in conditions is made to a chemical system in equilibrium, then the system will adjust in such a way as to partially counteract the imposed change

Question 6

Effects of a catalyst

Answer 6

Provides a lower activation energy pathway for a reaction. Thus increases for/rev reaction rates equally. Helpful in achieving equilibrium more quickly

Question 7

Concentration, pressure and volume don’t affect the value of K. What factor does?

Answer 7

Temperature