[pure-silver] Re: Basic Chemistry
- From: "Peter Badcock" <peter.badcock@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Mon, 16 Jun 2008 11:02:49 +1000
Nicholas, I concede that the formula does indeed work in either degK or
degF. My incorrect assumption.
Peter
2008/6/16 Nicholas O. Lindan <nolindan@xxxxxxxxxxxxx>:
> "Peter Badcock" <peter.badcock@xxxxxxxxx>
>
> Should T not be expressed in degrees Kelvin rather than degF ?
>>
>
> It does seem so when you look at it as:
>
> Aq + Br + Cs = T * (A + B + C)
>
> A, B, C ... are the volumes
> q, r, s ... are their initial temperatures
> T is the final temperature
>
> If you use absolute temperature and express the temps as
> q + K, r = K ... where K is 273, and simplify the result
> you will find the K's drop out.
>
> It's easy to see why when the equation is re-arraigned as
>
> r = [(A / B) * (T - q)] + T
>
> The formula looks at the ratio of the volumes and uses that
> to scale the temperature difference T - q the solution needs
> to be brought to. This temperature difference is then added to the base
> temperature. Since it works with differences the absolute values do not
> matter.
>
> If you need to raise 1 litre 10 degrees using 5 liters of
> water bath then the water bath should be 1/5 warmer -
> the temperature difference * the volumes is the same on
> the waterbath and the developer side.
>
>
> ==
> Nicholas O. Lindan
> Cleveland Engineering Design, LLC
> Cleveland, Ohio 44121
>
>
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