C5.3 Flashcards
What is a reversible reaction
When the products can react together to form the original reactants.
What is the forward reaction in terms of the backward reaction
The forward reaction is the opposite energy change of the backward reaction for example the forward reaction is (endothermic) the backward reaction is (exothermic)
What is a closed system
A closed system means that no substances can enter or leave. The rate of the forward reaction and backward reaction become equal the situation is called dynamic equilibrium.
What is at equilibrium
The rate of the forward and backward reactions happens
The concentrations of all reacting substances remains constant
What is the equilibrium position
Gives you an idea of the ratio of equilibrium concentrations of products to reactants.
What happens if the pressure increases
The equilibrium position moves in the direction of the fewest moles of gas
What happens if the concentration increases
If the concentration of a substance is increased, the equilibrium position moves in the direction away from the substance.
What happens if the temperature increases
If the temperature increases, the equilibrium position moves in the direction of the endothermic changes.
What does the equilibrium yield depend on
It depends on pressure, temperature and concentration
What are the costs of high pressures
Need lots of money to be held constant.
Why are temperatures needing to be high
Temperature can’t be low enough as the rate of reaction is too low.
