The compressibility of gaseous neopentane (2ndash;2hyphen;dimethyl propane) has been measured from 160.60deg;, the critical temperature, to 275deg; over a density range from 1 to 7 mole per liter, the maximum pressure being about 300 atmos. The constants of the Beattiehyphen;Bridgeman equation of state for the gas phase areR=0.08206,A0=23.3300,a=0.15174,B0=0.33560,b=0.13358,c=400times;104in units of normal atmos, liter per mole, deg;K(Tdeg;K=tdeg;C+273.13), the molecular weight being taken as 72.0924 g per mole. The second virial coefficients were determined graphically at each temperature.
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