denatured alcohol FTW

 

its too pricy....3 to 4X the cost of methanol....

 

Energy when the molecules move around and the water is absorbed?

I wonder if it does the same thing when methanol is pured into the water

 

ok..... looked through one of my thermodynamics textbooks (which I haven't cracked in over 10 yrs), and it's hydrogen bonding between meth and water that forms a tighter matrix and releases heat. Volume also goes down. I.E., you mix 500 ml of water and 500 ml of meth and total volume after mixing will be less than 1000 ml.

Patiently waiting for whoosh to tell me I'm wrong

 

be careful...hes going to pull the crc out on you

 

Chlorine or chloramines(ammonia) will have that reaction with methanol. That is why it is said to use destilled water.

 

you brought up a good point, the DI water system i used for the 75/25 mix has a ton of ozone in there to prevent microbial growth in the piping (whoosh might want to comment on this )...

maybe its combustion...water + O3 + methanol...

 

The heat comes from when the water first breaks up the molecular chains which exist in pure methanol, and then completely hydrates the hydroxyl groups before solvating the hydrophobic methyl groups.

Those aren't my words...it came from http://www.iop.org/EJ/article/0953-8...03/c021l3.html


Eric

 

 

from your reference.........

"As prototype hydrogen-bonding molecules, water and methanol (CH3OH, MeOH) both hold special status. MeOH has another claim to be at the focus of attention - it is one of the simplest amphiphile-like molecules. An amphiphile [1] is a bipolar molecule with solvent-loving and solvent-hating moieties, and they self-assemble to form superstructures (micelles, bilayers etc) in highly polar or highly non-polar solvents. Understanding the behaviour of amphiphiles is a central aim of soft-condensed-matter physics. Amphiphiles are also widespread in the chemical industry, e.g. as detergents, and are central to biology, most notably making up cell membranes. MeOH is the simplest amphiphile-like molecule capable of hydrogen bonding. The shortness of its alkyl chain means that MeOH probably does not show conventional self-assembly behaviour. Nevertheless, its clearly bipolar nature means that it can act as the starting point for a fundamental understanding of the solvation of amphiphiles. "

WTF!????? Well that explains everything.

In simple terms, these puppies get hot when mixed together!!!

 

Can you guys do a simple diagram with some crayons. I never took chemistry.

 

 

Thanks now I understand. That is some funny ****, I dont care who you are.

 

Priceless!!!!

 

sticky?