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Chem 101 > Lecture 24 > Flashcards

Lecture 24 Flashcards

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1
Q

What happens during a phase change

A

Weak interparticle forces are distrupted but the molecule remains intact

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2
Q

What is avogadros law

A

At a fixed T & P, volume occupied by a gas is directly proportional to the amount of gas

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3
Q

What is the ideal gas law

A

PV=nRT

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4
Q

What is boyles law

A

Fixed n & T

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5
Q

What is Charles law

A

Fixed n & p

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6
Q

What is STP

A

Standard temperature & pressure

0°c, 1 atm, 22.4L

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7
Q

What is the general gas law

A

(P1V1)/(n1T1) = (P2V2)(n2T2) = R = constant

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8
Q

What is combined gas law

A

P1V1/T1 = P2V2/T2 = nR = constant

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9
Q

How do you determine molar mass with the ideal gas law

A

M=(mRT)/(PV)

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10
Q

How do you covert the empirical formula to the molecular formula

A

Divide molar mass by the original molar mass and multiply by that value

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11
Q

What is the equation for density using the ideal gas law

A

D= (MP)/(RT)

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12
Q

How are molar mass & density related

A

They are directly proportional

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13
Q

How are density & temperature related

A

They are inversely related (increase temp = decrease density)

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14
Q

What is the mol ratio

A

Unknown/known

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15
Q

What is the formula for total pressure

A

Ptot= (ntRT)/V

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16
Q

How do you calculate partial pressure

A

P Ar = (nArRT)/V

17
Q

What is Dalton’s law of partial pressures

A

Pi - (Xi)(Ptot)

18
Q

How do you determine the amount of gas formed

A

Look up vapour pressure (PH2O on the chart) at the temperature of the experiment

Subtract it from Ptotal to get partial pressure

Calculate amount of product

Chem 101 (11 decks)

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