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LU5 CHEM EQUILIBRIUM > Factors on EQUILIBRIUM > Flashcards

Factors on EQUILIBRIUM Flashcards

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1
Q

What is Le Chatelier’s Principle?

A

external condition that disrupt the system, equilibrium shift to new equiposition

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2
Q

What is the external condition?

A
  • Catalyst
  • Changes of concentration
  • Changes of pressure
  • Presence of noble gas ( P increase)
  • Changes in Temperature
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3
Q

Does catalyst affect Kc or Kp?

A

No, it only reduce time taken to reach equilibrium

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4
Q

” aA + bB ⇌ cC + dD “
If add more reactant, equi shift to?

A

to the product ( to the right )

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5
Q

” aA + bB ⇌ cC + dD “
If add more product, equi shift to?

A

reactant ( left )

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6
Q

” aA + bB ⇌ cC + dD “
Remove reactant, equi shift to?

A

Reactant ( left )

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7
Q

” aA + bB ⇌ cC + dD “
Remove product, equi shift to?

A

Product ( right )

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8
Q

Does final position same like initial position?

A

No

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9
Q

Does amount of [product] or [reactant] after new equi same as amount of [product] or [reactant] initial equilibrium?

A

No

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10
Q

What happen to rate of reaction when pressure is increase?

A

Rate of reaction increase

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11
Q

What happen to the pressure when noble gasses is added?

A

increase

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12
Q

When P increase, equilibrium shift to the side that have ________ number of moles.

A

lower

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13
Q

When P decrease, equilibrium shift to the side that have ______ number of moles.

A

higher

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14
Q

Does pressure affect equilibrium Kp?

A

No

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15
Q

Does changes in pressure affect equilibrium position?

A

Yes

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16
Q

Does temperature affect equilibrium constant , K?

A

Yes

17
Q

When T is increased, does the rate forward and reverse is equal?

A

no

18
Q

Given Delta H = +ve
1.Rate of forward equal to?
2.Rate of reverse equal to?

A
  1. Endothermic
  2. Exothermic
19
Q

Given Delta H = +ve
What happen when T is increased?
What happen to the yield?
Explain

A
  • Equi shift to the right ( forward ) to absord heat to lower the T
  • concentration of product increase
20
Q

Given Delta H = +ve
What happen when T is decreased?
What happen to the yield?
Explain

A
  • Equilibrium shift to left ( reverse)
    to release heat to increase the T
  • concentration of reactant increase
21
Q

Given Delta H = -ve
1.What does forward reaction equal to?
2.What does reverse reaction equal to?

A
  1. Exothermic
  2. Endothermic
22
Q

Given Delta H = -ve
What happen when T is increased?
What happen to the yield?

A
  • Equilibrium shift to the left ( reverse )
    to absorb heat to lower the T
  • reactant increased
23
Q

Given Delta H = -ve
What happen when T is decreased?
What happen to the yield?

A

-Equilibrium shift to the right ( forward ) to release heat to increase the T
- product increased

LU5 CHEM EQUILIBRIUM (3 decks)

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