Equilibrium

Question 1

Le Chateliers’s Principle

Answer 1

If a change is made to a system, the system will counteract (undo) that change by favouring a direction.

Question 2

Characteristics of a System at Equilibrium

Answer 2

1. Reversible reaction
2. Dynamic state of balance present between both forward and backward reaction
3. No change in concentration of reactants or products once chemical equilibrium is reached
4. No bulk change in properties of the system (no colour; pressure change observable)
5. Is a closed system
6. Temperature must be constant
7. It can be reached from either direction
8. Any change to the system at equilibrium can be reversed if restored back to equilibrium conditions

Question 3

The Equilibrium Expression

Answer 3

Kc = ([C]^c[D]^d)/([A]^a[B]^b) where

aA + bB = cC + dD