A database for methane, ethane, and hydrogen in n-paraffins is compiled to evaluate the Soave-Redlich-Kwong (SRK) and Peng-Robinson (PR) equations of state (EOS) in predicting the phase behavior, Henry's constant (H-i), and infinite dilution partial molar volume((V) over tilde(i)(infinity)) for these systems. Five cases are employed in EOS evaluations through the use of bubble point pressure calculations. For each case, interaction parameters along with H-i and (V) over tilde(i)(infinity),,, obtained for both EOS. The SRK and PR EOS are adequately capable of predicting the phase behavior of tested systems. The ability of both EOS in predicting H-i and (V) over tilde(i)(infinity) are assessed employing the optimum predictive case (two interaction parameters for each isotherm of each binary system). The SRK and PR EOS are nearly equivalent in predicting H-i, and in good agreement with the available experimental data for the tested systems. However, the SRK and PR EOS are over-predicting the (V) over tilde(i)(infinity), particularly at higher temperatures.