Le Chatelier's Principle and Equilibrium Shift

Question 1

If partial pressure increases for reactants?

Answer 1

Then the rate of forward reaction increases
More reactants converted into products

Question 2

If partial pressure decreases for reactants?

Answer 2

Then the rate of forward reaction decreases
More products begin to be converted into reactants

Question 3

If partial pressure decreases for products?

Answer 3

The rate of reverse reaction decreases
More reactants begin to be converted into products

Question 4

If partial pressure increases for products?

Answer 4

Then the rate of reverse reaction increases
More products are turned into reactants

Question 5

If total pressure increases?

Answer 5

Then by LP the counteraction will be a partially decreased pressure. The system will favour the production of the side of the equilibrium reaction with fewer moles of gas. Fewer moles of gas mean less pressure within the system (since more moles is being converted into less moles).

TO INCREASE THE TOTAL PRESSURE INCREASE THE # OF MOLES (WHICH IS WHY IT FAVOURS THE MORE MOLES)

Question 6

If total pressure decreases?

Answer 6

Then by LP the counteraction will be a partially increased pressure. Thus the system will favour the production of the side with more moles of gas. Because less moles are being traded for more moles.

TO DECREASE THE TOTAL PRESSURE DECREASE THE # OF MOLES (WHICH IS WHY IT FAVOURS THE LESS MOLES)

Question 7

If the temperature increases?

Answer 7

• Endothermic reaction is favoured
• The system attempts to partially decrease the temperature

Question 8

If the temperature decreases?

Answer 8

• The exothermic reaction is favoured
• The system attempts to partially increase the temperature

Question 9

If the concentration increases?

Answer 9

• The forward reaction is favoured
• The reactant increase is partially counteracted

Question 10

If the concentration decreases?

Answer 10

• The reverse reaction is favoured
• The reactant decrease is partially counteracted by a little increase