Solubility of naphthalene in liquid and supercritical ammonia

The solubilities of naphthalene in liquid and supercritical ammonia have been measured for temperature from 333.15 to 497.15 K and pressures between 5 and 120 MPa. For pressures higher than 10 MPa and temperatures higher than 333.15 K the results can be described by a simple equation which enables interpolation and extrapolation especially with respect to pressure or density. Logarithmic isobars are not straight lines and the transition entropies calculated for temperatures higher than 373.15 K are negative at low pressures and positive for pressures higher than 22.0 MPa.