WorksheetsLe Chatelier's Principle QUIZ
Total questions: 12
Worksheet time: 3600secs
Name
Class
Date
1.
At what time (in seconds) is equilibrium established?
a)
0 seconds
b)
1 second
c)
5 seconds
d)
10 seconds
2.
Le Chaltelier's Principle states that if a chemical system at equilibrium is stressed,
a)
the system will adjust to increase the stress
b)
the system will adjust to reduce the stress
c)
the system will not adjust
3.
For the reaction...
SO2(g) + O2(g) <−> SO3(g)
If the concentration of SO2(g) is increased, the equilibrium of the reaction will ___________.
SO2(g) + O2(g) <−> SO3(g)
If the concentration of SO2(g) is increased, the equilibrium of the reaction will ___________.
a)
shift to the left
b)
shift to the right
c)
not shift
4.
For the reaction...
SO2(g) + O2(g) <−> SO3(g)
If the equilibrium shifts to the right, the concentration of O2(g) will ___________.
SO2(g) + O2(g) <−> SO3(g)
If the equilibrium shifts to the right, the concentration of O2(g) will ___________.
a)
increase
b)
decrease
c)
remain the same
5.
For the reaction...
energy + N2(g) + O2(g) <−> 2NO(g)
If O2(g) is removed, the concentration of N2 will _______.
energy + N2(g) + O2(g) <−> 2NO(g)
If O2(g) is removed, the concentration of N2 will _______.
a)
increase
b)
decrease
c)
remain the same
d)
double
6.
A + B <--> C + D ΔH= 151kJ
Rewrite the above equation with energy as a reactant or product:
Rewrite the above equation with energy as a reactant or product:
a)
A + B <--> C + D + energy
b)
A + B + energy <--> C + D
7.
For the reaction...
heat + N2(g) + O2(g) <−> 2NO(g)
If the heat is removed to the chemical system, the equilibrium will _______.
heat + N2(g) + O2(g) <−> 2NO(g)
If the heat is removed to the chemical system, the equilibrium will _______.
a)
shift to the left
b)
shift to the right
c)
not shift
8.
For the reaction...
N2 (g) + 3 H2 (g) <−> 2 NH3 (g)
If the pressure in the system is increased, the reaction will __________________.
N2 (g) + 3 H2 (g) <−> 2 NH3 (g)
If the pressure in the system is increased, the reaction will __________________.
a)
shift to the left
b)
shift to the right
c)
not shift
9.
When ΔH is negative it represents a(n)
a)
exothermic reaction
b)
endothermic reaction
10.
The three factors that affect the equilibrium of a reaction are temperature, pressure and __________.
a)
energy
b)
concentration
c)
enthalpy
d)
ice
11.
A(g) + B(aq) <> C(s)
ΔHrxn= -453 kJ/mol
If the [B] is decreased then the reaction is will shift to the _______.
ΔHrxn= -453 kJ/mol
If the [B] is decreased then the reaction is will shift to the _______.
a)
Left
b)
Right
c)
Stays the same
d)
Up
12.
What would happen to the position of the equilibrium when Oxygen is added to the system?
2SO3(g) ⇋ 2SO2(g) + O2(g)
2SO3(g) ⇋ 2SO2(g) + O2(g)
a)
SO3 will increase
b)
SO3 will decrease
c)
SO2 will increase
d)
none of the above
100 %
