Viscosity of N-Dodecane at Elevated Pressure and Temperature

The viscosity of normal dodecane is determined with a rolling-ball viscometer at temperatures 40?C, 50? C, 60?C, 75?C, and 100?C at pressures up to 5.1kbar. The estimated accuracy in the viscosity data is + 1 percent. The viscosity data is fitted by empirical an relation who facilitates the estimation of viscosity at desired pressure and given temperature. We have also checked the validity of some observations made by Kiran and Sen regarding the relationship between viscosity and density for n-dodecane. Our results have been compared with values reported by other authors in the literature and found to be in good agreement.