In free expansion, the external pressure is zero, i.e. work done is zero. Accordingly, free expansion is also called irreversible adiabatic expansion.
Thermodynamics
Thermodynamics is considered a part of physical chemistry.
Thermodynamics is the branch of physics that deals with the study of energy transport. Thermodynamics is one of the most important sectors of mechanical engineering. The three theories of thermodynamics state that matter and energy are not created nor destroyed, they are only altered.
"Unavailable for doing work" is related to the Second Law of Thermodynamics.
Thermodynamics is concerned with macroscopic processes
Thermal expansion in accordance with the first law of thermodynamics.
No, they are not free. You have to buy them at the store
zero. because in free expansion volume of gas increase against any resistance.
Some expansion packs are free but most cost Microsoft points:( there is a way to get them for free though but it's against xbox live terms and conditions.
Free and Open Source Software
Delta g
Thermodynamics
Free Soil Party, opposed the expansion of slavery
North American Free Trade Agreement
No, upgrading to the next expansion level is not free. You can update your client for free with the patches that automatically download, but to access new content, you have to pay for the expansion. The expansions to date are Burning Crusade (now included free when you buy the Basic WoW), Wrath of the Lich King, and Cataclysm. The next expansion is Mists of Pandaria, which should be released in 2012.
Magic
My college thermodynamics course was a beast...