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Kinetics Review 2
Test Description: Another Kinetics review
Instructions: Answer all questions to get your test result.
1) What is activation energy?
A
The energy given off in a chemical reaction
B
The energy required only for very slow reactions.
C
The energy required to start or activate a chemical reaction.
D
The energy required to activate a computer.
2) A higher concentration increases the reaction rate because according to collision theory, the molecules...
A
All of these choices.
B
Bounce off of each other more often, but with less energy.
C
Bounce off of each other more often, but with more energy.
D
Bounce off of each other more often, only.
3) A catalyst remains __________ in a chemical reaction.
A
as part of the products
B
unused
C
unchanged
D
as part of the reactants
4) What will a reversible reaction end with?
A
No reaction will occur.
B
Products Only.
C
Some reactants and some products.
D
Reactants Only.
5) Given the forward reaction is H2 + 1/2 O2 --> H20, what is the reverse reaction?
A
H2O --> 1/2 O + 1/2 H2
B
H2 + H2O --> 1/2 O
C
H2O --> H2 + 1/2 O2
D
None of these choices.
6) Given 2 H2 + O2 <--> 2 H2O at equilibrium, what is the effect of adding more H2O?
A
The reaction will shift towards the left (reactants).
B
The reaction will shift towards the right (products).
C
The reaction will not change.
D
The reaction will create more H2O.
7) Given N2 (g) + 3 H2 (g) <--> 2 NH3, what is the effect of increased pressure?
A
More H2 will be formed.
B
Nothing will change.
C
More N2 will be formed.
D
more NH3 will be formed.
8) When increasing the pressure on a reaction, the side with more ______ moles of gas will react faster.
A
Fewer.
B
Least
C
None of these choices.
D
More.
9) Entropy is a measure of the _______ of a system.
A
All of these choices.
B
heat
C
temperature
D
disorder
10) Which state has the lowest entropy?
A
Solid
B
Plasma
C
Liquid
D
Gas
*select an answer for all questions
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