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Final Review Ch. 19 (#2)
Final Review Ch. 19 (#2)
13
Chemistry
11th Grade
05/27/2006

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Term
In an endothermic reaction at equilibrium, what is the effect of raising the temperature?
Definition
the reaction makes more products.
Term
Why does a higher concentration make a reaction faster?
Definition
There are more collisions per second only.
Term
Which expression represent a reaction rate?
A. time/mass
B. number/time
C. energy/time
D. time/energy
Definition
B. number/time
Term
Activation energy is _________.
Definition
an energy barrier between reactants and products.
Term
The Keq of a rection is 4 * 10^-7. At equilibrium the ____ are favored.
Definition
products
Term
At what stage of a reaction does the activated complex exist?
Definition
Middle
Term
What is another name for the activated complex?
Definition
Transition State
Term
Why does a higher temperature cause a reaction to go faster?
Definition
There are more collisions per second and the collisions are of higher enerdy.
Term
Why does a small particle size generally cause a reaction to proceed faster?
Definition
There are more collisions per second only.
Term
At equilibrium, what is the rate of production of reactants compared with the rate of production of products?
Definition
the same
Term
What happens to a catalyst in a reaction?
Definition
it is unchanged.
Term
In an exothermic reaction at equilibrium, what is the effect of lowering the temperature?
Definition
The reaction makes more products.
Term
Which of the following factors affects the reaction rate the most?
A. relative masses of reactant and product molecules
B. relative energy in reactant and product molecules
c. activation energy
D. whether one or two reactant molecules is required
Definition
C. activation energy
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