For the separation at ambient conditions (298 K, 101.3 kPa) of a 35 mol% mixture of acetone (1) in water (2) into 99 mol% acetone and 98 mol% water, calculate the minimum work in kJ/kmol of feed. Activity coefficients at ambient conditions are correlated by the van Laar equations with A12 ¼ 2.0 and A21 ¼ 1.7. What is the minimum work if acetone and water formed an ideal solution?

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Units and Dimensions

Dimensions are the basic concepts of the measurement of quantities. Units are the means of expressing the dimensions. For instance, an area has a dimension of L2 and a unit of m2.