Kinetics Review 2: Question Preview (ID: 9672)

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What is activation energy?
a) The energy required to start or activate a chemical reaction.
b) The energy required only for very slow reactions.
c) The energy given off in a chemical reaction
d) The energy required to activate a computer.

A higher concentration increases the reaction rate because according to collision theory, the molecules...
a) Bounce off of each other more often, but with less energy.
b) All of these choices.
c) Bounce off of each other more often, only.
d) Bounce off of each other more often, but with more energy.

A catalyst remains __________ in a chemical reaction.
a) unchanged
b) unused
c) as part of the products
d) as part of the reactants

What will a reversible reaction end with?
a) Products Only.
b) No reaction will occur.
c) Some reactants and some products.
d) Reactants Only.

Given the forward reaction is H2 + 1/2 O2 --> H20, what is the reverse reaction?
a) H2O --> H2 + 1/2 O2
b) None of these choices.
c) H2O --> 1/2 O + 1/2 H2
d) H2 + H2O --> 1/2 O

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 create more H2O.
c) The reaction will not change.
d) The reaction will shift towards the right (products).

Given N2 (g) + 3 H2 (g) <--> 2 NH3, what is the effect of increased pressure?
a) more NH3 will be formed.
b) More H2 will be formed.
c) Nothing will change.
d) More N2 will be formed.

When increasing the pressure on a reaction, the side with more ______ moles of gas will react faster.
a) Fewer.
b) More.
c) Least
d) None of these choices.

Entropy is a measure of the _______ of a system.
a) disorder
b) heat
c) temperature
d) All of these choices.

Which state has the lowest entropy?
a) Solid
b) Liquid
c) Gas
d) Plasma

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