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《Higher Education in Chemical Engineering》 2013-01
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Application of Curve-fitting Method for Calculating Surface Tension of Aqueous Solutions

Ju Xuehai  
To measure the surface tension with the maximum bubble pressure method,one has to draw the γ-c curve,and determine the slope of many points on the curve by the tangent method.The latter is not only difficult to achieve,but also subjective with large accidental errors.Nowadays computers are popular in use.This reminds me of fitting various types of analytic expressions for the γ-c curve by the least square method.By differentiating γ with respect to c,a differential expression is obtained.By substituting c values into this differential expression,the dγ/dc values then could be obtained conveniently,objectively and accurately.This analytic method is recommended for expanding the ken of students.
【Fund】: 南京理工大学高等教育教学改革研究课题
【CateGory Index】: O647.1-4;G642
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【Citations】
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【Co-citations】
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