Chemistry 12 Equilibrium Review3
Chemistry 12
Review Sheet on Unit 2
Chemical Equilibrium
1.
What two things are equal at equilibrium?
_________________________________ and ________________________________
2.
Consider the following potential energy diagram:
a) Which reaction, forward or reverse, will be affected more by an increase in temperature? _______________________________________
b) Write a thermochemical equation for the forward reaction using the numerical value for the heat.
Answer _______________________________________________________________
c) When the temperature is first raised, which reaction will increase most in rate, forward or reverse? _____________________________________________________________
Explain why. __________________________________________________________
d) If the rate of the forward reaction is faster than the reverse reaction for awhile, what will happen to the [A2] and [B2]? ____________________________________________
e) If the [A2] and [B2] increases, what will happen to the rate of the reverse reaction?
___________________________________________
f) When the reverse reaction rate catches up to the forward reaction rate, the system is again at__________________________________________________________________
g) Since, for awhile, the rate of the forward reaction was faster than the rate of the reverse reaction, there would be an increase in the concentrations of ______________________ and a decrease in the concentration of _______________________________________ in the second equilibrium.
h) We can summarize by saying that the equilibrium has shifted to the _____________ as a result of increasing the temperature.
i) Draw a graph showing the rates of the forward and reverse reactions vs. time summarizing what happens in 2(c) to 2(f).
Rates
Rate (f)
Rate (r)
Time
A new equilibrium is achieved Temperature is
Increased
3.
Consider the reaction:
A2(g)
+
B2(g)
2C(g)
a) If one mole of A2 and one mole of B2 are placed in a 1.0 L container, an
Review Sheet on Unit 2
Chemical Equilibrium
1.
What two things are equal at equilibrium?
_________________________________ and ________________________________
2.
Consider the following potential energy diagram:
a) Which reaction, forward or reverse, will be affected more by an increase in temperature? _______________________________________
b) Write a thermochemical equation for the forward reaction using the numerical value for the heat.
Answer _______________________________________________________________
c) When the temperature is first raised, which reaction will increase most in rate, forward or reverse? _____________________________________________________________
Explain why. __________________________________________________________
d) If the rate of the forward reaction is faster than the reverse reaction for awhile, what will happen to the [A2] and [B2]? ____________________________________________
e) If the [A2] and [B2] increases, what will happen to the rate of the reverse reaction?
___________________________________________
f) When the reverse reaction rate catches up to the forward reaction rate, the system is again at__________________________________________________________________
g) Since, for awhile, the rate of the forward reaction was faster than the rate of the reverse reaction, there would be an increase in the concentrations of ______________________ and a decrease in the concentration of _______________________________________ in the second equilibrium.
h) We can summarize by saying that the equilibrium has shifted to the _____________ as a result of increasing the temperature.
i) Draw a graph showing the rates of the forward and reverse reactions vs. time summarizing what happens in 2(c) to 2(f).
Rates
Rate (f)
Rate (r)
Time
A new equilibrium is achieved Temperature is
Increased
3.
Consider the reaction:
A2(g)
+
B2(g)
2C(g)
a) If one mole of A2 and one mole of B2 are placed in a 1.0 L container, an