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Rate of Reaction and Le Chatelier's Principle

Total questions: 22

Worksheet time: 44mins

Name
Class
Date
1.
The following factors affect the position of equilibrium EXCEPT
a)
Concentration
b)
Pressure
c)
Temperature
d)
States of matter
2.
2SO2(g)+O2(g)⇌2SO3(g)
Removing O2(g) will
a)
shift equilibrium right
b)
shift equilibrium left
c)
decrease temperature
d)
have no change
3.
2SO2(g)+O2(g)⇌2SO3(g)
Adding SO2(g) will
a)
shift equilibrium right
b)
shift equilibrium left
c)
increase rate of reaction
d)
have no change
4.
2SO2(g)+O2(g)⇌2SO3(g)
Adding SO3(g) will
a)
shift equilibrium right
b)
shift equilibrium left
c)
increase K
d)
have no change
5.
2SO2(g)+O2(g)⇌2SO3(g)
Removing SO3(g) will
a)
shift equilibrium right
b)
shift equilibrium left
c)
increase pressure
d)
have no change
6.

2SO2(g)+O2(g)⇌2SO3(g)

Increasing pressure of container will

a)

shift equilibrium right

b)

shift equilibrium left

c)

slow rate of reaction

d)

have no change

7.

For N2 + 3H2 →2NH3 . When pressure is increased the equilibrium shift to right. Why?

a)

To increase the amount of products

b)

To reduce the pressure, as the right has less molecules

c)

Kc will increase when it is shifted to the right

d)

So it will increase the rate of reaction

8.

N2O4 → NO2 (endothermic). Why when temperature is increased is the position of equilibrium shifted to the RIGHT?

a)

Forward reaction is endothermic, thus reducing the temp

b)

Forward reaction is exothermic, thus reducing the temp

c)

Forward reaction is endothermic, thus increasing the temp

d)

Forward reaction is exothermic, thus increasing the temp

9.
Le Chatelier'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
10.
Changes in pressure will only affect substances that are in the __________ state.
a)
gaseous
b)
liquid
c)
solid
d)
plasma
11.
This symbol indicates that a reaction is ____________
a)
reversible
b)
irreversible
12.
For the reaction...
SO2 + O2  <−>  SO3
If the concentration of SO2 is increased, the equilibrium of the reaction will shift ___________.
a)
left
b)
right
c)
left and right 
d)
neither left nor right
13.
For the reaction...
heat  +  N2  +  O2  ↔  2NO
If the heat is added to the chemical system, the equilibrium will shift _______.
a)
left
b)
right
c)
left and right
d)
neither left nor right
14.
When the rate of the forward reaction is equal to the rate of backward reaction, the system is said to be in
a)
Chemical Equilibrium
b)
Chemical Balance
c)
Stoichiometry
d)
Chemical Reaction
15.
A chemical reaction that produces energy is an
a)
endothermic reaction
b)
exothermic reaction 
c)
energy
d)
existential crisis
16.
The three factors that affect the equilibrium of a reaction are temperature, pressure and __________. 
a)
energy
b)
concentration 
c)
enthalpy 
d)
ice 
17.
During equilibrium, the rates of the forward and the reverse reaction are ________
a)
the same 
b)
unequal
c)
unequal for exothermic reactions
d)
unequal for endothermic reactions
18.
The idea that when a system at equilibrium is stressed, it will react to relieve that stress and return to equilibrium is known as:
a)
Boyle's Law
b)
Le Chatelier's Principle
c)
Charles Law
d)
Denninger's Law
19.

N2 (g) + 3H2 (g) < -> 2NH3 (g) + Heat

add H2

a)

Shift Left

b)

Shift Right

20.

N2 (g) + 3H2 (g) < -> 2NH3 (g) + Heat

Add Heat

a)

Shift Left

b)

Shift Right

21.

Heat + N2O4 (g) ⇆ 2NO2 (g)

Add Heat

a)

Shift Left

b)

Shift Right

22.

N2 (g) + 3H2 (g) < -> 2NH3 (g) + Heat

remove N2

a)

Shift Left

b)

Shift Right