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Topic: Exothermic and envirnoment vs (5 msgs / 86 lines)
1) From: Rich
Actually, I want to know how it tastes when brewed.  Screw up the roast 
while worrying about the molecular chemistry does not seem to be an 
effective roasting technique.
miKe mcKoffee wrote:
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2) From: Ed Needham
Thermodynamics is not part of chemistry?
*********************
Ed Needham
"to absurdity and beyond!"http://www.homeroaster.com*********************

3) From: Alchemist John
Physical Chemistry II - Thermodynamics
It's what I took on my way to becoming a chemist.  It most certainly 
is chemistry.
That 'system' Rich is a set of chemical reactions (some endothermic, 
some exothermic) that occur when a batch of beans are roasted under a 
set of parameters.  The batch of beans is the matrix if you want to 
get a bit picky.
Also, don't get confused as to what is being defined.  The entire 
roasting process is clearly endothermic.  You use a lot of energy to 
roast beans.  There are also significant data confirming that 
portions of the roasting process are exothermic, and not just 3rd 
crack, i.e. combustion.
At 17:54 4/22/2008, you wrote:
<Snip>
John Nanci
AlChemist at large
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4) From: Rich
I am not confused....
Alchemist John wrote:
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5) From: Rich
Thermodynamics was an engineering core course and all BEng students 
partook of it, many flunked.  This was back in the early 60s, before the 
progressive higher education system in place today.  I have no idea what 
a chemist would have taken but I suspect that it was a course more 
directed towards chemistry.
Dave wrote:
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