Reversible reaction Flashcards
What is a reversible reaction?
A reversible reaction is a reaction which can be made to go in both ways under different conditions.
What is dynamic equilibrium?
A rate of forward reaction is equal to the rate of the backward reaction. The concentration of the reactants and the products become constant, this happens in a closed system
What is the effect of temperature on the position of the equilibrium?
If the temperature is increased, the system reacts to remove heat, it does this by moving in the endothermic direction where it absorbs heat energy. For the forward reaction to be exothermic, lower temperature shifts the equilibrium towards the right side, so forward reaction is favored. Increase in temperature shift the equilibrium towards left.
What is the effect on pressure on the position of equilibrium?
Increase in pressure will shift the position of equilibrium to the side with fewer molecules or moles. Decrease in pressure favors the side with more molecules of gas.
What is the effect on concentration on the position of the equilibrium?
Increase in concentration of a reactants shift the equilibrium to the right side. Decrease in concentration of the product shift the equilibrium to the right side. Decrease in concentration of a reactants shift the equilibrium to the left side. Increase in concentration of the products shift the equilibrium to the left.
What is the effect of catalyst on the position of equilibrium?
Does not effect the position of the equilibrium but the rate of reaction increases.
State the principle of Le Chatelier
When a change is applied to an equilibrium system. The system will change in a way that will oppose the change.
What are the reaction conditions for the Haber process
200atm
temperature of 400 Celsius
catalyst of iron powder
What are the reaction conditions for the Contact process?
Pressure: 2atm
Temperature: 450 Celsius
Catalyst: Vanadium pentoxide
