equations Flashcards by bethany loughead

Q

density

A

density = mass / volume

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Q

concentration

A

moles / volume

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Q

moles

A

mass / Mr

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Q

molar gas volume

A

n x 24

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Q

number of particles

A

n x 6.022X10^23

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Q

ideal gas equation

A

pV = nRT

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Q

% atom economy

A

(Mr of desired product / total Mr of reactants) X100

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Q

% yield

A

(actual yield / theoretical yield) X100

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Q

% uncertainty

A

(uncertainty / measured value) X100

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Q

enthalpy change

A

q = mc#T

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Q

mean bond enthalpy

A

H = E(bond enthalpy produced) - E(bond enthalpy reactants)

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Q

enthalpy of formation

A

Hf = E#H(products) - E#H(reactants)

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Q

enthalpy of combustion

A

Hc = E#H(reactants) - E#H(products)

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Q

Kc

A

[C]^c [D]^d / [A]^a [B]^b

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Q

Kp

A

p[C]^c p[D]d / p[A]^a p[B]^b

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Q

partial pressure

A

mole fraction x total pressure

Q

mole fraction

A

number of moles of a gas / total moles of all gas

Q

Arrenhius equation

A

K = Ae^ Ea/RT

Q

entropy

A

S = S(products) - S(reactants)

Q

gibbs free energy

A

G = #H - T#Ssystem

T = #H/#Ssystem

Q

pH

A

pH = -log10 [H+]

Q

acid dissociation

A

Ka = [H+] [A-] / [HA]

Q

pKa

A

pKa = -log Ka

Q

molar volume

A

v/n