Re: Salty boling water

I mean the water surrounding the salt boils first, I am not sure if the
boiling point in these circumstance increases or decreases. Maybe it is
possible the salt is hotter than the water. I do not know the right answer.
I cannot explain it myself. I am looking for an explanation whatever is: the
water is hotter, any strange effect, etc.

"Andy Resnick" <andy.resnick@xxxxxxxxxxx> escribió en el mensaje
news:eme6pn$qml$1@xxxxxxxxxxxxxxxxxxxxxx
pepe wrote:
When heating salty water, if the salt is together in the center of the
recipient, the water around the salt starts to boil before the rest of
the water. If the water is stirred, so the salt is distributed all around
the recipient, it finishes the boiling until the whole water gets to the
boiling point. According to the cryoscopy (Raoult's Law) the salt should
delay the boiling point, but apparently in this case the salt makes the
water to boil earlier. ¿Can someone explain this observation?

You are correct, the boiling point increases due to the change on
osmolarity:

http://www.resonancepub.com/osmometry.htm

http://www.cop.ufl.edu/safezone/prokai/pha5100/collgtv.htm

Why do you claim the boiling point is lowered?
--
Andrew Resnick, Ph.D.
Department of Physiology and Biophysics
Case Western Reserve University


.

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