Boiling Point. Elevation of Sea Water
1974 Volume 28 Issue 3 Pages 156-161
Details
1974 Volume 28 Issue 3 Pages 156-161
The data related to the boiling point elevation is very important for designing a desalination plantand also as the constant for the thermodynamics of sea water. Many B. P. E. data have so far been reported, but some of them have less reliability because of a big discrepancy among the reported, values. Therefore, it is necessary to get the B. P. E. data with high degree of accuracy.
In this study, the experimental B. P. E. data of sea water were obtained in the temperature range of 60.0°C to 130.0°C and in the salinity range of about 1.7% to 11% by using a new twin-type. ebulliometer made of stainless steel.
The data obtained from this work agreed well with Lhe estimated values by Stoughton and Lietzke and with the observed values by Bromley. The B. P. E. data of sea water were correlated with salinity% and system temperature (boiling point of pure water) for an equation with six constants. Their constants were determined by the least square method, and the following equation was derived therefrom:
B. P. E.=0.528764×10-1.X+0.826030×10-3·XT-0.315082×10-7·XT2+0.320553×10-2·X2-0.144367×10-4·X2T+0.184416×10-6·X2T2
where, B. P. E.=boiling point elevation, °
X=salinity, wt.%
T=system termperature, °
The calculated values from the equation were approximated within 0.006°C of average deviation and 0.020°C of the maximum error to the experimental values.
