Gas equilibria and Kp Flashcards

1
Q

what is partial pressure

A

In a mixture of gases, each individual gas exerts its own pressure

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2
Q

what is a mole fraction

A

Its the proportion of gas mixture that is made up of a particular gas

eg 4 moles of gas in total, and if 2 moles is gas A
then mole fraction of gas A is 1/2

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3
Q

mole fraction FORMULA

A

number of moles of gas / total number of moles of gas in a mixture

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4
Q

Partial pressure formula

A

mole fraction of gas x Total pressure of the mixture

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5
Q

what’s the different between kp and kc

A

kp is for partial pressure ( gases)

kc is for concentrations

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6
Q

kp formula way to remember

A

products/reactants

with their respective big numbers acting as powers

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7
Q

to work out kp units…

A

Use kpa as a unit

and work out the same way like we did for kc

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8
Q

what is kp affected by

and how does changing this thing affect equilibrium

A

ONLY affected by temperature just like kc

changing temperature changes how much product is formed at equilibrium, this changes the mole fractions of gases present, which changes partial pressures

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9
Q

if amount of product decreases then kp……

A

decreases

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10
Q

What is a homogenous equilibrium system?

A

One in which everything in the equilibrium mixture is in the SAME PHASE

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