Excess enthalpies of { xN 2 + (1 − x)CO}(I) at 83.82 K: experiment and theory

Abstract

The excess molar enthalpies H m E {xN 2 +(1−x)CO}(1) have been determined at 83.82 K using a low-temperature batch calorimeter. The value of H m E (x=0.5) at mixture saturation pressure is (41.2 ± 1.1) J·mol −1 . The results for H m E are in good agreement with the values derived from published phase equilibria. The ability of two theoretical methods to predict the excess enthalpy was tested. The simple van der Waals one-fluid theory gives good results; however. a spherical reference-based perturbation theory is found to give an even better prediction of H m E (within 5.1 per cent at x = 0.5).