# Order of reaction

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What is the definition of activation energy?
The minimum amount of energy that colliding particles need to cause a reaction
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How do you know if a reaction is FIRST order?
As the initial concentration is doubled, the Initial rate doubles too
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How do you know if a reaction is SECOND order?
As the initial concentration is doubled, the initial rate is quadrupeled
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How do you know if a reaction is ZERO order?
As the initial concentration is doubled, the initial rate remains the same.
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How do you determine overall order of reaction?
Add up all the "orders" in the rate equation"
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How may a Rate equation look for ZERO, FIRST AND SECOND order respectively
Zero: No symbol, First: [X], Second: [X]2
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What are the key features of the Maxwell-Boltzman curve?
1) The area iundet the curve is proportional to the total number of molecules in a sample 2) the mean energy does not occur at the peak, but to the right of it
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What is a rate-limiting step?
The step of the process which determines the whole processes rate
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Which order is more likely to have a rate-determining step?
first order, due to the proportions of rate and concentration being the same
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What happens to the rate of a step if it has high activation energy?
It is low, due to a small fraction having energy to react.
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What happens in an equilibrium if the concentration of an acid is increased?
The concencentration of H+ ions increases and the EQ. shifts to the right
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What happens in an equilibrium if the concentration of an acid is increased?
H+ ions react with OH- ions and perform neutralisation and the EQ. shifts to the right.
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How do you write the Kc equation?
Kc= [C]c [D]d / [A]a [B]b
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Why do catalysts not change Kc?
The forward and backwards reactions are increased at the same ratio
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How can an increase in temperature change Kc?
The value of Kc increases if the endothermic process is favoured, and the Kc will decrease if the Exothermic process is favoured.
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## Other cards in this set

### Card 2

#### Front

How do you know if a reaction is FIRST order?

#### Back

As the initial concentration is doubled, the Initial rate doubles too

### Card 3

#### Front

How do you know if a reaction is SECOND order?

### Card 4

#### Front

How do you know if a reaction is ZERO order?

### Card 5

#### Front

How do you determine overall order of reaction?