Reactivity 2.3 (HL) Flashcards

1
Q

The reaction quotient (Q)

A

Can be calculated at any point in the rxn. Tells us if the reaction is at equilibrium and if not which way we need to go to get to equilibrium.

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2
Q

Q<K

A

The rxn proceeds to the right in favour of the products (the reaction will move towards products to reach equilibrium)

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3
Q

Q=K

A

The rxn is at equilibrium, no net rxn occurs

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4
Q

Q>K

A

The rxn proceeds to the left in favour of the reactants (the reaction will move towards reactants to reach equilibrium)

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5
Q

Gibbs energy change (ΔG)

A

A measure of the work that is available from a system

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6
Q

What is the gibbs energy (ΔG) change ta the point of equilibrium?

A

0, because neither the forwards or backwards rxn is favoured

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7
Q

The more negative the value of ΔG the more the ___ rxn is favoured and the ___ the value of K

A

Forward, larger

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8
Q

When K=1, what is the equilibrium mixture and the value of ΔG?

A

Equilibrium mixture= neither products nor reactants favoured (at eq)
ΔG= 0

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9
Q

When K»1, what is the equilibrium mixture and the value of ΔG?

A

Equilibrium mixture= Contains mainly products
ΔG<0 (negative)

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10
Q

When K«1, what is the equilibrium mixture and the value of ΔG?

A

Equilibrium mixture= Contains mostly reactants
ΔG> 0 (positive)

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