kc and equilibrium Flashcards

1
Q

what does dynamic mean

A

the forward and backward reactions proceed at equal rates

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2
Q

equilibrium

A

the concentration of the reactant and products are constant

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3
Q

how is a dynamic equilibrium reached

A

rate of reaction of the forward and backward reaction becomes the same

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4
Q

le chateliers principle

A

the position of equilibrium will shift to oppose a change made to the system

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5
Q

if concentration decreases

A

-equilibrium shifts to the left
-to oppose the decrease of …
-yield of reactants will decrease

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6
Q

if pressure increased

A

-equilibrium shifts to the right
-oppose increase in pressure
-fewer moles on the right
-so yield of products increases

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7
Q

if pressure is decreased

A

-equilibrium shifts to the left
-oppose decrease of pressure
-more moles on the left
-do yield of reactants increases

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8
Q

if there were equal number of moles of product and reactant, what effect would changing the pressure have

A

no effect

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9
Q

increasing volume causes a ________ in pressure

A

decrease

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10
Q

decreasing volume causes a __________ in pressure

A

increase

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11
Q

exothermic reaction

A

-releases heat energy
-temperature of surroundings increases
-enthalpy change is negative

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12
Q

endothermic reactions

A

-absorb heat energy
-temperature of surroundings decreases
-enthalpy change is positive

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