Gkourtis
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Hello, Gkourtis, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:
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I hope you enjoy editing here and being a Wikipedian! Please sign your messages on discussion pages using four tildes (~~~~); this will automatically insert your username and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or ask your question on this page and then place {{help me}} before the question. Again, welcome! Wizard191 (talk) 17:29, 16 May 2011 (UTC)
With regards to the article Compressed air energy storage, it is not the case that all work done in an adiabatic compression is spent on heating the gas; see the article adiabatic process. (An isothermal process can also do work.) In addition, a real gas is different from an ideal one.
As for the rest of your contributions, you didn't provide any references. (Verifiability is one of the core Wikipedia policies.) That said, the original figure of energy density wasn't referenced, either. - Mike Rosoft (talk) 20:37, 25 February 2012 (UTC)