Final Review Ch. 19 (#2)

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