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Molecular volumes and expansivities of liquid normal hydrogen and parahydrogen
Journal of research of the National Bureau of Standards
The molecular volumes at saturation of liquid normal hydrogen and parahydrogen between 14° and 20.4°K were m easured with a fused-quartz dilatometer, the amount of hydrogen being determined from the press ure of the gas in a calibrated flask at a measured temperature. The results are represented by the equations: V(n-H z) cm 3 mole-' = 24.747 -0.08005T+ 0.012716Tz V(p-Hz) em3 mole-' = 24.902-0.0888T+0.013104Tz At the normal boiling point of n-Hz (20.38°K), V(n-H2) = 28 .397 ± 0.010 and L1 V(p-ndoi:10.6028/jres.019.011 fatcat:ovhzeuwwyfe5znc4ms3v52aihi