Talk:Boiling point

message: Half way down the page it states 260mbar is 26.39kPa. This is at odds with the article for Pascals, which states that 1 bar = 100,000 Pascals.  — Preceding unsigned comment added by 86.160.105.124 (talk) 18:37, 2 June 2011 (UTC)
thread_title: mBar to Pascals

message: My kid looked up the defintion of boiling point here on Wikipedia and got a headache. This is overly complicated. Give a basic laymen term definition then go into the doctoral-orgasmic Ph.D. bulls**t.  —Preceding unsigned comment added by 71.188.231.28 (talk) 23:32, 17 February 2010 (UTC)
replies: text: Perhaps the Simple Wikipedia would be a good place to turn when the English one gets too technical? The "Simple English" in the left margin goes to a page that is more in tune with what a lay reader probably wants. It's no excuse for the inaccessible mess here, but it's a good trick in general for readers to know. Feel free to suggest specific improvements...Wikipedia is the encyclopedia anyone, even frustrated readers, can edit. DMacks (talk) 04:07, 18 February 2010 (UTC)
thread_title:  Use understandable language 

message: Hi.  Wikipedia is very useful in providing data, such as the boiling point of numerous chemicals.  Does anyone know if those are normal boiling points or standard boiling points?  For some things, it does make a difference.  Thank you!  El Zarco 08:22, 27 November 2011 (UTC)
thread_title:  Standard or Normal 

message: This article is skimpy.  A number of factors influence boiling points, such as atomic weight of elements and types of bonding of compounds.  It would be nice to have a section discussing these factors.  — Preceding unsigned comment added by Skysong263 (talk • contribs) 22:44, 18 December 2011 (UTC)
replies: text: You have a point.  I have improved a Citizendium article on "Boiling point" by adding two sections there which discuss these factors and other important things.  Some day I plan to insert them here also to improve this article.  H Padleckas (talk) 19:36, 6 March 2012 (UTC)
replies: text: I have just inserted those two sections here along with a picture of a hypothetical example of a binary boiling point diagram.  Maybe some day I'll add a sentence or two on azeotropes to the mixtures section at the end.  Also, it would be a good idea to have a section on experimental (laboratory) boiling point determination.  Does anybody care to write one?  H Padleckas (talk) 20:06, 6 March 2012 (UTC)
thread_title:  factors influencing boiling points 

message: Hello,
I was just using the Clausius-Clapeyron equation on this page and I believe you may have missed out a variable in the equation, which you stated as:
T_B = \Bigg(\frac{\,R\,\ln(P_0)}{\Delta H_{vap}}+\frac{1}{T_0}\Bigg)^{-1}
But it is without the relative pressure calculation "(P0/P)" that is requisite. It should therefore be:
T_B = \Bigg(\frac{\,R\,\ln(\frac{P_0}{P})}{\Delta H_{vap}}+\frac{1}{T_0}\Bigg)^{-1}
If I have misunderstood anything and this was intentional for some reason or another, I apologise, I am not an expert on chemistry or thermodynamics.
NiklasZ (talk) 11:29, 26 March 2012 (UTC)
replies: text: The logarithm of P0/P is equal to the logarithm of P0 when P (the normal atmospheric pressure) is expressed in atmospheres because then P = 1 atmosphere. If P is expressed in any other units (Pa, bar, torr, etc) then the equation should indeed include P ... however, the equation as it currently stands is correct since P is expressed in atmospheres. mbeychok (talk) 17:51, 26 March 2012 (UTC)
thread_title:  The Clausius-Clapeyron Equation 

message: I've added a few parts from this article at heat transfer, here. Prokaryotes (talk) 16:31, 5 April 2014 (UTC)
thread_title:  Heat transfer 

message: To User:Materialscientist, </br>
I think the addition of the latest graph, which is the image :File:Boiling point vs molar mass graph.png, is a very good addition for the article.  However, it has been placed in the article at too small a size and is difficult to make out easily.  I think I'll enlarge it some day.  It shows the effect of molar mass and compound polarity on a compound's boiling point.  It might be nice to put in separately a little information on isomers too.  H Padleckas (talk) 12:16, 10 June 2014 (UTC)
replies: text: I've enlarged the above image from 350px to 500px in the article for improved readability and repositioned the pic to a center position instead of the right side.  I also made a few edits, mostly minor, to this image in WikiCommons for better visibility.  If somebody has any ideas for further editing the image to improve it, they can edit the latest version or any other version of :File:Boiling point vs molar mass graph.png in WikiCommons.  It's even possible to edit parts of both, then superimpose either one on the other, assuming one knows how to do that.  H Padleckas (talk) 23:20, 10 June 2014 (UTC)
thread_title: Addition of new graph to article

message: As of 3/5/2015, reference 7 points to a McGraw-Hill textbook appendix instead of the actual IUPAC publication, which can be found here on pages 1246-1247 132.170.57.13 (talk) 19:59, 5 March 2015 (UTC)
replies: text: Added ref, thanks. Materialscientist (talk) 21:45, 5 March 2015 (UTC)
thread_title:  Sourcing the IUPAC standard boiling point 

message: Need a reference for the following quote:
"For example, water boils at 100 °C (212 °F) at sea level, but at 93.4 °C (200.1 °F) at 2,000 metres (6,600 ft) altitude"
But the United States Dept of Agriculture states "With each 500-feet increase in elevation, the
boiling point of water is lowered by just under 1 °F" http://www.fsis.usda.gov/shared/PDF/High_Altitude_Cooking_and_Food_Safety.pdf
Therefore, at 6600 feet, water boils at 208 F
Therefore, at 2km, water boils at 97.8 Celsius
Cleverwater (talk) 14:34, 6 November 2016 (UTC)
replies: text: Um.... No. The maths is wrong. 6600 is equivalent to 13 * 500 ft (approx) and on that calculation, the boiling point of water would be 199 degrees Fahrenheit at 6600 ft. I always regard any source that talks in approximations as being intended for  a non technical audience (hikers and campers perhaps?) and not usable in this sort of article. Incidentally the source itself says that water boils at 208 Degrees F at 2000 ft and not at 6600 feet. Always pays to read the source. Regards  Velella  Velella Talk   16:23, 6 November 2016 (UTC)
thread_title:  Boiling Point of Water as a Function of Altitude