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I Deal Gas (or Nerts to You)
By Joe Pivetti

The gas law (PV=nRTZ), with the added Z, is no longer ideal. Benoît Paul Émile Clapeyron has Johannes Diderik van der Waals to thank for the nonpareil. The finished cut contains units of pressure (P), like pascals, torrs, atmospheres, bars and the squeeze, And units of volume (V), like liters, gallons, barrels, pints or encyclopedia books X, Y and Z. The number of moles (n, or N over NA, and not Oaxaca sauce) is molecularly defined, Either that or its a problem with spies. The gas constant (R) is expressed in energy per mole per degree (Or the dash provided by the beauty mark on your intended PhD). The law also has units of temperature (T), degrees Kelvin or Rankine (The two who decreed our units of this fevered kind), And our friend at the end, compressibility (Z), is unitless, from tables... Having been caught 'tween the leaves that weren't stable.