Talk:Enthalpy of vaporization

From Wikipedia, the free encyclopedia

WikiProject Chemistry
Chemistry Portal
This article is within the scope of WikiProject Chemistry, which collaborates on Chemistry and related subjects on Wikipedia. To participate, help improve this article or visit the project page for details on the project.

Article Grading: The article has not been rated for quality and/or importance yet. Please rate the article and then leave comments here to explain the ratings and/or to identify the strengths and weaknesses of the article..
WikiProject Physics This article is within the scope of WikiProject Physics, which collaborates on articles related to physics.
Start This article has been rated as Start-Class on the assessment scale.
??? This article has not yet received an importance rating within physics.

Help with this template This article has been rated but has no comments. If appropriate, please review the article and leave comments here to identify the strengths and weaknesses of the article and what work it will need.

Contents

[edit] Water values

There are two values for water posted on this page, 40.8 kj/mol and 40.65 kj/mol. Could someone verify the correct value, or explain the differences?

[edit] Webelements says for Radium:

Enthalpy of vaporization [/kJ mol-1]: about 125 and not 37! doesn't that sound more plausible? Malbi

I think water should be included too. Andries 15:27, 31 May 2004 (UTC)

Yes, go ahead, please; also in the water article.--Patrick 21:15, 31 May 2004 (UTC)
done, although I dunno much about the subject and feel uncertain. Andries 20:42, 3 Jun 2004 (UTC)

[edit] Enthalpy and heat

I think the word "heat" should be replaced by "enthalpy". It is more suitable and more accurate.

I think Don Anonymous is tilting at windmills. Gene Nygaard 13:43, 23 Apr 2005 (UTC)

[edit] Definition

Heat of vaporization is a quantity that exists at conditions other than only standard pressure.--Renier Maritz 17:13, 13 October 2005 (UTC)

[edit] Title change

Physchim62 has changed the title of this article without discussion here, and despite the fact that opposition to a change from the most common English name of this quantity by changing "heat" to "enthalpy".

Physchim62 has also ignored the fact pointed out by Renier Maritz above, and has created a title of more limited scope by adding the word "standard" to the title. The article, however, remains written in the more general sense.

This name change needs to be undone. I don't have time to take care of the redirects right now, but intend to do it later unless someone else does it before I get to it. Of course, the same problem applies to heat of fusion. Gene Nygaard 14:54, 27 October 2005 (UTC)

[edit] Proportional to melting point?

Just looking at the list it seems that the heat of fusion is correlated with the melting or boiling point. Is there a theory/formula connecting the two? njh 11:20, 25 November 2005 (UTC)


[edit] Units Consistency

Wikipedia should make it's units consistent for physical properties. The pages on specific heat, heat of vaporization, and heat of fusion all have different units. That is, grams, kilograms, and moles all used which makes comparisons all the more difficult.

The units in the table of latent heat in the latent heat article are J/g. The units in the table for latent heat of vaporization kJ/kg. However the values for water are 2272 and 2260 respectively. So, according to wikipedia the latent heat of vaporization is both 2272 J/g and 2260 kJ/kg. How? The true value is 2259.36 J/g.Antinoah (talk) 02:53, 24 February 2008 (UTC)

[edit] N/A's

Some of the elements marked N/A (e.g. Actinium) and ??? (e.g., Terbium) have heats of vaporization added in these infoboxes. Why are they listed there and not here? --Geoffrey 21:21, 18 April 2006 (UTC)

[edit] Value for Hafnium not consistent

Although the difference is minor, there is a discrepency between this page and the information page of Hafnium about the enthalpy of vaporization (571 vs 575 kJ/mol). Also webelements gives a complete other value: 630 kJ/mol. I don't know which is the better value, I just noticed the difference. --Paul 14:55, 17 July 2006 (UTC)

[edit] heat is no source of enegy

energy could be gotten from the mass of an atom.thus ,mass of an atom of an element is the determinant of energy content of any substance.the more an atom of an element the more the collision which then increase the kinetic energy of an atom. —Preceding unsigned comment added by 41.219.244.62 (talk) 18:16, 17 May 2008 (UTC)