Chemical Kinetics Flashcards

1
Q

Differential Rate Law? (General one)

A

-Δ[A]/Δt

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2
Q

Rate Law (n=1)

A

Rate = k[A]

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3
Q

Slope (n=0)

A

Slope = -k

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4
Q

Half-Life (n=2)

A

t(1/2) = 1/k[A]o

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5
Q

Rate Law (n=0)

A

Rate = k

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6
Q

Plot needed to give a straight line (n=1)

A

ln[A] vs t

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7
Q

Slope (n=2)

A

Slope = k

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8
Q

Half-Life (n=0)

A

t(1/2) = [A]o/2k

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9
Q

Integrated Rate Law (n=2)

A

1/[A] = kt + 1/[A]o

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10
Q

Half-Life (n=1)

A

t(1/2) = ln(2)/k

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11
Q

Plot needed to give a straight line (n=2)

A

1/[A] vs t

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12
Q

Integrated Rate Law (n=0)

A

[A] = -kt + [A]o

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13
Q

Rate Law (n=2)

A

Rate = k[A]^2

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14
Q

Integrated Rate Law (n=1)

A

ln[A] = -kt + ln[A]o

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15
Q

Plot needed to give a straight line (n=0)

A

[A] vs t

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16
Q

When n= 1, how does t(1/2) vary when [A] varies?
- in what way does [A] vary to make t(1/2) in this way?

A

t(1/2) is constant and does NOT depends on [A]

17
Q

When n= 0, how does t(1/2) vary when [A] varies?
- in what way does [A] vary to make t(1/2) in this way?

A

t(1/2) gets shorter as [A]o decreases
–> As the [A]o goes down, the time taken for the [ ] to go down gets shorter

18
Q

When n= 2, how does t(1/2) vary when [A] varies?
- in what way does [A] vary to make t(1/2) in this way?

A

t(1/2) gets longer as [A]o decreases
–> As the [A]o goes down, the time taken for the [ ] to go down gets longer

19
Q

For n=0 what is the relationship between the variation in rates and in [ ]

A

Rate stays the same as [ ] VARIES
–> same slope throughout time

20
Q

For n=2 what is the relationship between the variation is rates and in [ ]

A

Rate is squared as [ ] is double (x2)
–> going really fast

21
Q

For n=1 what is the relationship between the variation in rates and in [ ]

A

Rate is double as [ ] is double
–> take ln[ ] and get k (slope)

22
Q

What is the Arrhenius Equation?

A

k = Ae^(-Ea/RT)

23
Q

What is the equation when solving the Arrhenius equation with the natural log?

A

ln(k2/k1) = Ea/R (1/T1 - 1/T2)