Potential Energy Diagrams I
Potential Energy Diagrams II
Chemical Equilibrium
Le Chatelier's Principle
100
What is the potential energy of the reactants?
400 kJ
100
What is the potential energy of the reactants in the reverse reaction?
200 kJ
100
When the forward and reverse reactions are proceeding at the same rate, the reaction is said to be...
What is equilibrium?
100
For the reaction:
H2(g) + I2 (g) + heat <---> 2HI(g)
State the effect if more I2 were added to the system.
Shift to the right
200
What is the potential energy of the products?
200 kJ
200
What is the potential energy of the products in the reverse reaction?
400 kJ
200
Which stressor (what can you change) involves counting molecules on both sides of the reaction?
What is pressure?
200
Given the equation representing a chemical system at equilibrium in a sealed, rigid container:
H2(g) + I2(g) + heat <----> 2HI(g)
When the temperature of the system in the container is increased, the equilibrium shifts to the
Shift to the right
300
Is this reaction endothermic or exothermic?
Exothermic
300
Is the reverse reaction endothermic or exothermic?
Endothermic
300
This addition of this will speed up BOTH the rate of the forward AND reverse reactions.
What is a catalyst?
300
For the following reaction:
CaCO3(s) + heat <----> CaO(s) + CO2(g)
What shift would occur if the temperature was decreased
Shift to the left
400
What is the potential energy of the activated complex of this reaction?
500 kJ
400
What is the activation energy of the reverse reaction?
300 kJ
400
Fe3+ + SCN- <------> FeSCN2+
If I added Fe3+ to the system the reaction would shift to the...
What is right?
400
For the following reaction:
CH4(g) + H2O(g) + heat <----> CO(g) + 3H2(g)
What will the shift be if the pressure of the system is increased
Shift to the left
500
What is the activation energy of this reaction?
100 kJ
500
Please draw an example of the curve if a catalyst were added to this reaction.
See teacher
500
N2O4 + heat <---> 2NO2
In order to shift to the right the temperature would need to...
What is increase?
500
Suggest three ways to increase concentration of SO3 in this reaction: 2SO2 +O2 <-----> 2SO3
1. remove SO3
2. increase either SO2 or O2
3. increase pressure (decrease volume)