Shape factors for the light hydrocarbons

Corresponding-states shape factors for ethane, propane, iso-butane, n-butane and nitrogen, with methane as the reference fluid, have been determined from available experimental data. We present simple six-parameter correlations of the results for each substance in a way that enforces thermodynamic consistency. Using the one-fluid model with our shape factors, compression factors of mixtures of ethane and methane have been calculated and found to be in good agreement with experimental values.