In an experiment, a sphere of crystalline sodium chloride (NaCl) was suspended in a stirred tank filled with water at 20°C. Its initial mass was 100 g. In 10 minutes, the mass of the sphere was found to have decreased by 10 percent. The density of NaCl is 2160 kg/m3. Its solubility in water at 20°C is 320 kg/m3. Use these results to obatin an average value for the mass transfer coefficient.
What will be an ideal response?
A sphere of crystalline sodium chloride (NaCl) was suspended in a stirred tank filled with water. The average mass transfer coefficient is to be determined.
Assumptions 1 The properties of NaCl are constant.
Properties The density of NaCl and its solubility in water at 20?C are given to be 2160 kg/m3 and 320 kg/m3, respectively.
Analysis The initial diameter of the sphere is
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