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### AuthorTopic: Stoichiometric formulas for Unit 4 Chemistry  (Read 2973 times) Tweet Share

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#### charmanderp

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##### Stoichiometric formulas for Unit 4 Chemistry
« on: September 24, 2012, 10:13:58 pm »
+4

Thermochemistry
$E=VIt$(volts, amps and seconds respectively) or $E=VQ$

$E=SHC \times m \times \Delta T$ (joule/gram °C, grams and joules; change where appropriate)

$\text{Heat of reaction} = \frac{E}{n}$ (joules and amount in moles)

$C_F=\frac{E}{\Delta T}$ J/°C (joules and degrees celsius)

Electrochemistry/electrolysis
$Q=It$ (amps and seconds)

$Q=n(e^-) \times F$ (amount of electrons in moles and Faraday's constant)

$\text{Avogadro's number} = N_A = \frac{F}{e}$ (Faradays's constant (charge on one mole of electrons and e where e is equal to the charge on a single electron)

$\text{Potential difference}=E^{\circ}_\text{cathode} - E^{\circ}_\text{anode}$

I've seen questions that will require you to use an amalgamation of formulas from either section to solve formulas. I've probably left some out/if you think there are any other important ones, post here.
« Last Edit: September 26, 2012, 09:54:35 pm by charmanderp »
University of Melbourne - Bachelor of Arts majoring in English, Economics and International Studies (2013 onwards)

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##### Re: Stoichiometric formulas for Unit 4 Chemistry
« Reply #1 on: September 24, 2012, 10:20:19 pm »
0
Just to make sure everyone knows what they are. If someone could $\LaTeX$ them that would be fab.
Done.

Thermochemistry
$E=VIt$(volts, amps and seconds respectively) or $E=VQ$

$E=SHC \times m \times \Delta T$ (joule/gram °C, grams and joules; change where appropriate)

$\text{Heat of reaction} = \frac{E}{n}$ (joules and amount in moles)

$C_F=\frac{E}{\Delta T}$ J/°C (joules and degrees celsius)

Electrochemistry/electrolysis
$Q=It$ (amps and seconds)

$Q=n(e^-) \times F$ (amount of electrons in moles and Faraday's constant)

$\text{Avogadro's number} = N_A = \frac{F}{e}$ (Faradays's constant (charge on one mole of electrons and e where e is equal to the charge on a single electron)

$\text{Potential difference}=E^{\circ}_\text{cathode} - E^{\circ}_\text{anode}$

I've seen questions that will require you to use an amalgamation of formulas from either section to solve formulas. I've probably left some out/if you think there are any other important ones, post here.

With $E=SHC \times m \times \Delta H$, isn't it $\Delta T$ -- change in temperature? Also you can use the Kelvin scale as the units, since that's has the same 'intervals' as the Celsius scale (i think so anyway).

multiple edits: playing around with the latex.
« Last Edit: September 24, 2012, 10:26:28 pm by laseredd »