Talk:Vanadium(V) oxide

Untitled
How many tons of V2O5 are needed to produce only 1 ton of Ferrovanadium?
 * Molar mass of V2O5 = 182 g/mol. This produces 2 x 51g = 102 g vanadium metal.  Since ferrovanadium contains anywhere from about 35 to 80% vanadium metal the answer to your question has quite a wide range, but roughly speaking (using the above calculation) 1 ton of V2O5 produces about 1 ton of ferrovanadium. Walkerma 16:00, 31 August 2005 (UTC)

Liquid crystalline behaviour
An anonymous editor is insisting on including a section on this topic. However, the writing is so specialised as to be incomprehensible to the average reader - my PhD is in organic chemistry, and I don't understand a word of it. I have cleaned up the worst misspellings/grammar, but if this is to stay the editor needs to do the following: 333t an undergraduate chemistry student could understand, and a high school student could get the gist of. If the above concerns cannot be addressed, then I'm afraid the section will have to be removed again. Wikipedia is not Chemical Reviews, that's what the chemical literature is for. Walkerma 16:03, 15 February 2007 (UTC)
 * Explain why this topic is important enough to appear on a general page on V2O5.
 * Explain the topic in terms th
 * Make the section briefer; currently this section is about as long as the "uses" section. Considering the huge importance of the uses of V2O5, that makes it unbalanced.  It might be OK if (say) V2O5 is about to become a major component of all the world's computer monitors, but somehow I don't think that's the case here.

Missing atoms in equation
In the Vanadium(V) oxide section, the equation :SO2  +  V2O5  →  SO3  +  2VO2 seems to be missing a few oxygen atoms. Would someone please fix it or explain the apparent four missing atoms? Thanks Jim1138 (talk) 00:12, 29 April 2012 (UTC)

You have one sulfur, 7 oxygen, and 2 vanadium atoms on the left hand side. You have one sulfur, 7 oxygen, and 2 vanadium atoms on the right. Mass balance seems right. --Rifleman 82 (talk) 04:55, 29 April 2012 (UTC)
 * I can't count. Can I? Thanks Jim1138 (talk) 18:20, 29 April 2012 (UTC)

Formation enthalpy
The enthalpy of formation seems very low (about -150 kJ) compared to sources such as the CRC Handbook which gives it as -1552 kJ (in my 1983-era 64th edition). The entropy values are similar, though. Any idea what the quoted source (R. Robie, B. Hemingway, and J. Fisher, “Thermodynamic Properties of Minerals and Related Substances at 298.15K and 1bar Pressure and at Higher Temperatures,” US Geol. Surv., vol. 1452, 1978.) says about methodology? It looks suspiciously like an exact 10-fold difference. Ewen (talk) 12:18, 2 May 2018 (UTC)


 * NIST says -1551 kJ.


 * Answering my own question, the original source [pdf https://pubs.usgs.gov/bul/1452/report.pdf] has been misquoted. I'll correct the data now. Ewen (talk) 13:05, 2 May 2018 (UTC)