| Summary: | A spectrophotometdc technique for the determination of the CuSO4 soret coefficient of a CuSO4-water binary solutions system is described.
A shod coloumn of solutions is placed between horizontal metal plates that are held at different temperatures. The subsequent changes in composition due to thermal diffusion are followed by monitoring changes of transmitance near the end of the solutions coloumn.
In water, CuSO4 diffuses to the warm compartment of coloumn. The soret coefficient of CuSO4 0,0254 molal in water agrees with the appropiate theory, i.e. 17.60x10-3 °C-1 on the average.
Keywords: Soret coefficients, diffusion, thermal
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