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May 19, 2020 at 11:27 comment added Bob D @ElFlea It's really a relative question. The issue is the degree of deviation from ideal gas behavior. For a real gas, the equation of state can be generalized as $PV=ZnRT$ where $Z$ is the compressibility factor. A value of 1 corresponds to ideal gas behavior. The following link gives a table of compressibility factors for air for various combinations of pressure and temperature. enggcyclopedia.com/2011/09/air-compressibility-factor-table Hope it helps.
S May 19, 2020 at 9:08 history suggested El Flea CC BY-SA 4.0
The equation's variables had a subscript 'f' (final) on the left side, and 'i' (initial) on the right. Switched it for consistency.
May 19, 2020 at 7:16 comment added El Flea For the ideal gas equation, what is too high a pressure and too high a temperature? Approximately, if not exactly.
May 19, 2020 at 7:11 review Suggested edits
S May 19, 2020 at 9:08
May 19, 2020 at 5:42 history edited Bob D CC BY-SA 4.0
deleted 29 characters in body
May 18, 2020 at 15:59 history answered Bob D CC BY-SA 4.0