|WikiProject Solar System||(Rated Start-class, Mid-importance)|
Hydrogen an ice?
The article claims Uranus and Neptune are classified as ice giants because they contain a substantial amount of ice, and also states that hydrogen is an ice. If H is an ice then why aren't Saturn and Jupiter classified as ice giants? Qemist (talk) 03:37, 29 July 2008 (UTC)
Why they come up with the term ice when it's 1000s of deg. C in Uranus and Neptune's interior? Why is fluid interior called ice when it's almost as hot as the surface of the sun? Uranus and Neptune has no solid surface period. No place to land, it's that simple.--Freewayguy What's up? 22:53, 18 August 2008 (UTC)
The article somewhat tries to explain that these volatile chemicals have different boiling points, and relative to those boiling points (high or low) they are classified as either ice or gases. The term ice in this context does not strictly describe ice that we get from freezing water, but it merely describes a chemical that sort of stays "frozen" or unchanged in higher temperatures. All this then correlates to how the planet functions. Very important stuff in geology. I did not get this information on the web, I am a geology student. The article should elaborate on how ice and gases are classified in planets like Neptune and Jupiter, respectively. — Preceding unsigned comment added by 18.104.22.168 (talk) 21:06, 26 November 2011 (UTC)
Confusion about what is a volatile compound
Compounds such as titanium nitride (melting point 2930 Celsius), tungsten carbide(melting point 2870 Celsius), and aluminum oxide (melting point 2072 Celsius) are not volatile compounds. So, the statement: "Examples include...all compounds of C,H,O and/or N..." is highly misleading. QuantumShadow recently put a near quote of these examples into the Colonization of the Moon article leading to the possible interpretation that Oxygen is scarce on the Moon when it is in fact more plentiful than any other single element by weight. Using only C,H,O, and N as building blocks can yield a practically infinite variety of volatile compounds, but there is still graphite consisting solely of carbon that sublimes or breaks down at some temperature over 3000 Celsius in a vacuum or inert atmosphere. Still Carbon should be considered as volatile because most atmospheres will cause it to chemically break down and dissipate as a gas at reasonably low temperatures. Oxygen and hydrogen in particular will react with carbon to form volatiles. We should think of some wording that does not promote false interpretations. - Fartherred (talk) 00:20, 5 November 2012 (UTC)