19 Equilibrium Flashcards

1
Q

What main 2 types is equilibria divided into?

A

Homogenous and heterogenous

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2
Q

What is homogenous equilibrium?

A

Homogenous equilibrium is an equilibrium in which all the species making up the reactants and products have the same physical state.

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3
Q

What is heterogenous equilibrium?

A

Heterogenous equilibrium is an equilibrium in which the species making up the reactants and products have different physical states.

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4
Q

What is the mole fraction?

A

(Number of moles of A)/(Total number of moles in gas mixture)

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5
Q

How do you calculate partial pressure?

A

mole fraction of A * total pressure

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6
Q

What does the value of K give?

A

The value of K gives the exact position of the equilibrium.

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7
Q

What does K=1 indicate?

A

K=1 indicates an equilibrium halfway between reactants and products.

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8
Q

What does K=100 indicate?

A

K=100 indicates an equilibrium well in favour of the products.

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9
Q

What does K=1*10^-2 indicate?

A

K= 1*10^-2 indicates an equilibrium well in favour of the reactants.

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10
Q

What effect does increasing temperature have on the equilibrium constant? (EXOTHERMIC)

A

The equilibrium constant DECREASES

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11
Q

What effect does increasing temperature have on the equilibrium constant? (ENDOTHERMIC)

A

The equilibrium constant INCREASES

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12
Q

What effect do changes in concentration or pressure have on the value of equilibrium constant?

A

The value of an equilibrium constant K is unaffected by changes in concentration or pressure.

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13
Q

How does a catalyst affect equilibrium constant?

A
  • Catalysts affect the rate of a chemical reaction but not the position of equilibrium.
  • Catalysts speed up both the forward and reverse reactions in the equilibrium by the same factor.
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