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(20 P) Q1A small diameter tube closed at one end was filled with acetone to within 18mm of the top and maintained at 290K with

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(20 P) Q1A small diameter tube closed at one end was filled with acetone to within 18mm of the top and maintained at 290K with a gentle stream of air blowing across the top. After 15000sec, the liquid level was fallen to 27.5mm, the vapour pressure of acetone was 21.95 kPa and atmospheric pressure was 99.75kPa. Calculate the diffusivity of acetone in air. kg/kmol

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