Kinetics Flashcards

1
Q

What is the instantaneous rate equation?

A

aA + bB –> cC +dD

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2
Q

What is rate?

A

Rate is the number of times a reaction happens per second this means how fast the product increases and how fast the reactant decreases

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3
Q

What is the difference between average and instantaneous rate

A

Average rate is the rate over the whole reaction where is instantaneous rate is at one set point in time

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4
Q

What are the six factors that can affect rate?

A

Nature of the reaction, temperature, light, state, concentration and catalysts

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5
Q

Can you predict the right law from the balanced overall equation

A

No

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6
Q

What is a zeroth order reaction?

Include;

  • Rate =
  • Unit of K =
  • Graph equation =
  • Half Life =
A

Rate ∝ k[A]o

Rate = k

Unit of K = mol L-1

Graph equation = [A] = [A]o+ kt

Half Life = t1/2 = [A]0 / 2k

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7
Q

What is a First order reaction?

Include;

  • Rate =
  • Unit of K =
  • Graph equation =
  • Half Life =
A

Rate ∝ k[A]

Rate = k [A]

Unit of K = s-1

Graph equation = In[A] = In [A]0 -kt

Half Life = t1/2 = In2/ k

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8
Q

What is a First order reaction?

Include;

  • Rate =
  • Unit of K =
  • Graph equation =
  • Half Life =
A

Rate ∝ [A]2

Rate = k[A]2

Unit of K = Lmol-1s-1

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

Half Life = t1/2 = 1/k[A]o

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9
Q

What are the 2 conditions of collision theory

A
  1. The molecules have to have enough energy to surpass the activation energy
  2. The molecules have to be correctly aligned
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10
Q

What is 0oC in K

A

0oC = 273.15K

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11
Q

What is Arrhenius’s Equation based off?

A

y = mx+c

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12
Q

What are the following components of Arrhenius’s Equation?

  1. k
  2. Ae
  3. Ea
  4. R
  5. T
A
  1. k = rate constant
  2. Ae = Orientation
  3. Ea = Activation Energy
  4. R = Gas constant
  5. T = Temperature
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13
Q

Can a catalyst appear in the overall balanced equation?

A

No they do not

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14
Q

Are catalysts found in the rate law for a reaction

A

Homogeneous catalysts usually appear in the rate law

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15
Q
A
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