BEHAVIOR OF THE DIELECTRIC CONSTANT OF FLUIDS NEAR A CRITICAL POINT

摘要: Thermodynamic and statistical mechanical arguments indicate that the temperature derivative of dielectric constant fluids diverges weakly at critical point. Following a thermodynamic procedure proposed by Mistura, we derive an expansion for static near gas-liquid point binary liquids mixing, which includes correction terms to asymptotic behavior. The relationship with derivation behavior is discussed. paper concludes assessment current experimental situation. expected exhibit singularity point’-‘). Several attempts have been made study effect experimentally, but subject has remained elusive. Part difficulty arises from weak character singularity. An analysis measurements close complicated possible presence spurious effects due gradients or gravitys). Furthermore, studies other fluid properties revealed simple power law restricted temperatures within few hundredths percent temperature’,‘). In this range difficulties become severe’s’). Hence, it becomes desirable reconsider theoretical predicting so as elucidate nature its well needed extend description over larger range. Exploring argument originally Mistura’), our approach based on application critical-point universality in electric field. Adopting