Rate of Reaction (D) Flashcards

1
Q

State all the factors that affect the rate of reaction.

A
  • Concentration of Reactants
  • Temperature of Reactants
  • Pressure of Gas Reactants
  • Particle Size of Solid Reactants
  • Presence of Catalyst
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1
Q

What is activation energy?

A

Activation energy is** the least amount of energy that colliding reactant particles must possess to react with each other.**

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2
Q

How does an increase in concentration of reactants affect rate of reaction?

A

More particles per unit volume → Frequency of effective collisions increases → rate of reaction increases

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3
Q

How does an increase in temperature affect rate of reaction?

A

Particles gain energy and move faster → more particles have energy ≥ activation energy → Frequency of effective collisions increases → rate of reaction increases

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4
Q

How does an increase in pressure affect rate of reaction?

A

Particles are forced closer together in a smaller volume → More particles per unit volume → Frequency of effective collisions increases → rate of reaction increases

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5
Q

How does an increase in particle size affect rate of reaction?

A

Lower surface area for particles to collide → Frequency of effective collisions decreases → rate of reaction decreases

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6
Q

How does a catalyst affect rate of reaction?

A

Provides an alternative pathway of lower activation energy for the reaction to occur → more reactant particles will have energy ≥ activation energy → rate of reaction increases

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7
Q

There will only be an increase in yield of a reaction when…

A

the number of molesof the limiting reactant is increased

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