Quiz 8 Flashcards
A reaction is at dynamic equilibrium.
Name 3 main variables that can be used to change the position of equilibrium
Concentration
Temperature
Pressure
State and explain the effect on the position of an equilibrium of adding a catalyst
None,catalysts only affect the rate of reaction
A reversible reaction is at dynamic equilibrium. State and explain the effect on the position of the equilibrium if the concentration of reactants is increased
Equilibrium shifts to the right
To decrease the concentration of reactants
Define dynamic equilibrium
The point in a reversible reaction in a closed system when the forward and reverse reactions occur at the same rate
In a reaction below,state and explain the effect of increasing the pressure on the position of the equilibrium.
N2(g) + 3H2(g) —-> 2NH3(g)
Equilibrium shifts to the right
To favour the side with fewer moles of gas
If a reaction is exothermic in the forward direction,state whether it will be endothermic or exothermic in the reverse direction
Endothermic
A reversible reaction is at dynamic equilibrium. State and explain the effect on the position of the equilibrium if the concentration of products is increased
Equilibrium shifts to the left
To decrease the concentration of products
A reversible reaction is endothermic in the forward direction and reaches equilibrium. State and explain the effect on the position of the equilibrium if the temperature is decreased
Equilibrium shifts to the left
To favour the exothermic direction
Define reversible in the context of chemical reactions
A reaction in which the products can react to form the original reactants
State le chateliers principle
If a system is at equilibrium and a change is made to any of the conditions,then the system repsonds to counteract the change
In a reaction below,state and explain the effect of decreasing the pressure on the position of the equilibrium
N2(g) + 3H2(g) —-> 2NH3(g)
Equilibrium shifts to the left
To favour the side with more moles of gas
A reversible reaction is endothermic in the forward direction and reaches equilibrium. State and explain the effect on the position of the equilibrium if the temperature is increased
Equilibrium shifts to the right
To favour the endothermic direction
In the reaction below,state and explain the effect of increasing the pressure on the position of the equilibrium
H2(g) + I2 ——> 2Hl(g)
No effect on equilibrium
There are equal numbers of moles of gas on each side
A reversible reaction is exothermic in the forward direction and reaches equilibrium. State and explain the effect on the position of the equilibrium if the temperature is decreased
Equilibrium shifts to the right
To favour the exothermic direction
A reversible reaction is at dynamic equilibrium when the equilibrium shifts to the left. Describe the effect this has on amount of product and reactant
More reactant
Less product
A reversible reaction is at dynamic equilibrium. State and explain the effect on the position of the equilibrium if the concentration of products is decreased
Equilibrium shifts to the right
To increase the concentration of products
A reversible reaction is at dynamic equilibrium. State and explain the effect on the position of the equilibrium if the concentration of reactants is decreased
Equilibrium shifts to the left
To increase the concentration of reactants
A reversible reaction is at dynamic equilibrium when the equilibrium shifts to the right. Describe the effect this has on the amount of product and reactant
More product
Less reactant
Name the experimental set up necessary for a reaction to reach dynamic equilibrium
A closed system (equipment that prevent prevents escape or addition of reactants or products)
Give or describe the symbol that is used to show a reversible reaction
Double half-headed arrow
A reversible reaction has reached dynamic equilibrium. Describe the expected change in the amount of reactant
None
A reversible reaction has reached dynamic equilibrium. Describe the expected change in the amount of product
None
