Supercritical fluids have some properties of a gas and some properties of a liquid. diffusion coefficients of naphthalene in supercritical carbon dioxide at 35˚c at different pressures were measured by knaff and schlunder (chem. eng. process., 1987 ) with the following values: pressure (bar) d x 108 (m2 /s) 118 1.136 167 0.939 226 0.841 the pressure dependence of the viscosity of supercritical co2 at 35˚c has been correlated, yielding the following equation: 2 6.14 48.8 0.114 p p     where viscosity is in cp and pressure is in bar. use the wilke-chang equation to predict the diffusion coefficient of naphthalene in supercritical co2. what conclusions can you draw? does supercritical co2 behave more like a liquid (where the wilke-change equation would be applicable) or more like a gas?