[pure-silver] Re: Basic Chemistry
- From: "Nicholas O. Lindan" <nolindan@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Sun, 15 Jun 2008 10:17:19 -0500
"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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