D. H. L. Prasad

Boiling temperature measurements on the binary mixtures formed by acetonitrile with some chloroethanes and chloroethylenes at 94.6 kPa

Boiling temperatures at 94.6 kPa, over the entire composition range are measured for the binary mixtures, formed by acetonitrile with 1,2,-dichloroethane, 1,1,1-trichloroethane, 1,1,2,2-tetrachloroethane, trichloroethylene and tetrachloroethylene, making use of a Swietoslawski type ebulliometer. The liquid phase composition versus temperature measurements are found to be well represented by the Wilson model.

Measurements and theoretical analysis of excess enthalpies and excess volumes of methyl methacrylate+n-alkanes (n-pentane, n-hexane, n-heptane, n-decane and n-dodecane)

Abstract Excess molar enthalpies ( H m E ) and excess molar volumes ( V m E ) have been measured for liquid binary mixtures of methyl methacrylate (MMA)+ n -alkanes ( n -pentane, n -hexane, n -heptane, n -decane and n -dodecane). The H m E and V m E values are positive over the whole composition range and vary quasi-regularly with the increase in carbon chain length of n -alkanes. The Flory (F) and Prigogine–Flory–Patterson (PFP) theories of solution thermodynamics have been used to analyze the H m E and V m E data. The key parameter needed for the analysis is the interaction parameter χ 12 and has been treated as an adjustable parameter to be fitted to the H m E and V m E values of the binary mixtures. We have applied Flory as well as Patterson models to evaluate the single value for χ 12 over 50 data points. The H m E and V m E values are split into interactional, free volume and P * contributions by using PFP theory. The free volume contributions to H m E and V m E data are found to be smaller and mostly negative. The interactional contribution calculated from PFP theory is not only in sign agreement but also close to measured H m E values. The interactional contribution to V m E values are always large and positive. The free volume and P * effects are found to be dominant and balance the over estimation of interactional term in MMA+ n -pentane, + n -hexane and + n -heptane. The P * contribution, however, becomes positive in MMA+higher n -alkanes (> n -heptane).

Bubble temperature measurements on methanol with o-xylene and ethanol with m-xylene and p-xylene

Bubble temperatures at 95 kPa at seven liquid compositions, spaced evenly over the entire composition range, are measured for the three binary systems noted in the title, using a Swietoslawski-type ebulliometer. The temperature (T) vs. composition (x) measurements are found to be well-represented by the Wilson model. The calculated values of the vapor phase composition and the liquid phase activity coefficients are also presented.

Distributed Deployment Scheme for Homogeneous Distribution of Randomly Deployed Mobile Sensor Nodes in Wireless Sensor Network

One of the most active research areas in wireless sensor networks is the coverage. The efficiency of the sensor network is measured in terms of the coverage area and connectivity. Therefore these factors must be considered during the deployment. In this paper, we have presented a scheme for homogeneous distribution of randomly distributed mobile sensor nodes (MSNs) in the deployment area. The deployment area is square in shape, which is divided into number of concentric regions centered at Base Station, these regions are separated by half of the communication range and further deployment area is divided in to numbers of regular hexagons. To achieve the maximum coverage and better connectivity MSNs will set themselves at the center of the hexagon on the instruction provided by the BS which is located at one of the corner in the deployment area. The simulation results shows that the presented scheme is better than CPVF and FLOOR schemes in terms of number of MSNs required for same coverage area and average movement required by MSNs to fix themselves at the desired location and energy efficiency.

Boiling point temperatures of the binary mixtures of 1,3-dimethylbenzene with methanol, 1-propanol, or 2-propanolat 95 kPa

Boiling point temperatures at 95 kPa over the entire composition range are measured for the three binary systems formed by 1,3-dimethylbenzene with methanol, 1-propanol, and 2-propanol. A Swietoslawski-type ebulliometer was used for the measurements. The composition versus temperature measurements are well represented by the Wilson model.

Boiling Temperature Measurements on the Binary Mixtures of m-Xylene with some Aliphatic Alcohols

Boiling temperatures at 95 kPa, over the entire composition range are measured for the four binary systems formed by m-xylene with n-butanol, iso -butanol, sec -butanol and tert -butanol. A Swietoslawski-type ebulliometer was used for the measurements. The composition versus temperature measurements are well represented by the Wilson model.

Density and Viscosity of Methanol + Trichloroethylene, n-Propanol + Trichloroethylene and n-Butanol + Trichloroethylene Mixtures

Abstract Density and Viscosity measurements on the binary mixtures of methanol + trichloro-ethylene, n-propanol + trichloroethylene, and n-butanol + trichloroethylene binary mixtures at 303.15, 313.15 and 323.15K are reported. The representation of the data by simple mixing rules is also studied.

Vapor-Liquid Equilibria for Chlorobenzene with Butan-1-ol, 2-Methylpropan-1-ol and 2-Methylpropan-2-ol at 94.6 kPa

Abstract Vapor-liquid equilibria at 94.6 kPa, over the entire composition range were measured for three binary systems - butan-1-ol(1) + chlorobenzene(2), 2-methylpropan-1-ol(1) + chlorobenzene(2), 2-methylpropan-2-ol(1) + chlorobenzene(2)- using a Swietoslawski type ebulliometer. The composition (x 1) vs. temperature (T) data were found to be well represented by Wilson model.

Density and Viscosity of the Binary Mixtures Formed by p-Xylene with Methanol, n-Propanol and n-Butanol+

Abstract Density and viscosity measurements on the binary mixtures of methanol+p-xylene, n-propanol+p-xylene and n-butanol+p-xylene at 303.15, 313.15 and 323.15K are reported The representation of the data by common mixing rules is also studied.

Phase equilibria in the binary mixtures formed by ethylbenzene with some aliphatic alcohols at 95.8 kPa

Phase equilibria are determined over the entire composition range, through measurements on the bubble points of the binary mixtures of ethylbenzene with methanol, ethanol, n-propanol, iso-propanol, n-butanol, iso-butanol, sec-butanol and tert-butanol. A Swietoslawski-type ebulliometer is used for the measurements. The liquid phase composition versus temperature measurements, found to be well represented by the Wilson model, are used to establish the phase equilibria.