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Posted by Bruce Richmond on August 23, 2009, 8:34 pm
 



The relationship still holds.  While it is hot the oil is thinner and
more volitile.  As I said, some of they hydrocarbons that are liquid
at room temperture will evaporate when heat is applied.


When you wrote that you heated the oil to increase its viscosity I
assumed you meant its viscosity after returning to room temperture.
If what you meant was make it thinner while hot then daestrom is
correct and it does not contradict anything that I wrote.

Bruce

Posted by Curbie on August 23, 2009, 8:43 pm
 



Oh boy,

Is "thinness" yet another oil attribute unrelated to viscosity???

Does it have a technical term so I can read up on it???

Thanks,

Curbie

Posted by Bruce Richmond on August 24, 2009, 1:07 am
 


Anorexic?

Seriously there is no doubt what thinner means while increase/decrease
of viscosity could be misunderstood.  I hope you were joking above but
with no smiley faces it's hard to know.



Posted by Curbie on August 24, 2009, 3:24 am
 


I wasn't joking, Im sorry Im so slow on the uptake on this but I am
serious and after re-reading this thread twice, Im still confused!

If I understand this properly:
1)    Volatility and viscosity are tied together.
2)    They are affected inversely (as volatility increases, viscosity
decreases).
3)    Both volatility and viscosity are dependent on the length or
complexity of their hydro-carbon or carbon chains (SVO).

And this where I am in the mud, it seems to me (moron alert) that when
we pre-heat fuel we are either
A)    Decreasing viscosity through kinetic energy while not effecting
volatility as defined as chain length or complexity (implying that
volatility and viscosity are tied with a caveat).
B)    The pre-heat is shortening some of the chain length or complexity
which recombines when cooled.
C)    Something is wrong or lacking with my three points of
understanding.
D)    Something at play here not yet defined.

I apologize for being a moron but, I hope you can see why I cant seem
to get these pieces to quite fit yet, I dont know if the answer to my
problem is A, B, C or D???

Thanks,

Curbie

Posted by Don T on August 24, 2009, 4:16 am
 


I wasn't joking, Iím sorry Iím so slow on the uptake on this but I am
serious and after re-reading this thread twice, Iím still confused!

If I understand this properly:
1) Volatility and viscosity are tied together.
2) They are affected inversely (as volatility increases, viscosity
decreases).
3) Both volatility and viscosity are dependent on the length or
complexity of their hydro-carbon or carbon chains (SVO).

And this where I am in the mud, it seems to me (moron alert) that when
we pre-heat fuel we are either
A) Decreasing viscosity through kinetic energy while not effecting
volatility as defined as chain length or complexity (implying that
volatility and viscosity are tied with a caveat).
B) The pre-heat is shortening some of the chain length or complexity
which recombines when cooled.
C) Something is wrong or lacking with my three points of
understanding.
D) Something at play here not yet defined.

I apologize for being a moron but, I hope you can see why I canít seem
to get these pieces to quite fit yet, I donít know if the answer to my
problem is A, B, C or D???

Thanks,

Curbie

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 Volatility is the tendency of  -anything-  to turn to vapor. Each different
liquid/mixture of liquids has a different "boiling point" so if you have a
liquid that at 65 deg F doesn't tend to evaporate and is fairly hard to pour
but when heated to 95 deg F starts to evaporate and is a lot easier to pour
but does not yet boil then by increasing the temperature of the liquid you
have decreased the viscosity and increased the volatility by raising the
temperature closer to its boiling point. We haven't necessarily changed any
molecule chain's length though.

--


Don Thompson

Stolen from Dan:  "Just thinking, besides, I watched 2 dogs mating once,
and that makes me an expert. "

There is nothing more frightening than active ignorance.
~Goethe

It is a worthy thing to fight for one's freedom;
it is another sight finer to fight for another man's.
~Mark Twain



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