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Chemistry Exam 2
Chapters 13, 14, and 15
Terms in this set (55)
Zero order units for k
first order units for k
1/s or s-
second order units for k
1/ms or m-s-
the minimum amount of energy required to start a chemical reaction (for molecules to collide)
a transitional structure that results from an effective collision and that persists while old bonds are breaking and new bonds are forming (unstable)
How is activated complex formed?
when electrons move between two molecules at height of the reaction
rate of reaction over a period of time
The reaction rate at a particular time as opposed to the average rate over an interval of time.
Why do gas particles move faster when temperatures rise?
The temperature increases kinetic energy between gas particles
Why do the rates of nearly all reactions decrease as reactants form products?
Rates of reactions decrease because less collisions are occurring between molecules so less energy is being produced
What does catalyst affect?
Rate of the reaction - because the reaction goes faster
Rate constant reaction - because activation energy is lowered
If a catalyst increases the rate of a reaction, does it also increase the reverse reaction?
Yes, both are increase because activation energy (Ea) is lowered
A backyard chef turn on the propane gas to a barbecue grill. Even though the reactions between propane and oxygen are spontaneously, gas does not begin to burn until the chef presses the igniter button to produce a spark. Why is this parking needed
This park is needed to overcome the activation energy.
How are forward and reverse reaction rates related in a system at chemical equilibrium?
Both forward and reverse reaction rates are equal to one another. In order for them to be equal, there must be no change in the products or reactants
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