Localized adiposity. 1  ICD-9-CM 278.1 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 278.1 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
One mole of an ideal gas has a volume of 22.7 L at STP as defined by IUPAC. At normal conditions such as standard temperature and pressure, most real gases behave qualitatively like an ideal gas. Many gases such as nitrogen, oxygen, hydrogen, noble gases, and some heavier gases like carbon dioxide can be treated like ideal gases within reasonable tolerances.
Ideal Gas Definition. An ideal gas is a gas whose pressure P, volume V, and temperature T are related by the ideal gas law. PV = nRT, where n is the number of moles of the gas and R is the ideal gas constant. Ideal gases are defined as having molecules with negligible size with an average molar kinetic energy dependent only on temperature. At low temperature, most gases behave enough like ideal gases that the ideal gas law can be applied to them.