One-kg blocks of wet Borax laundry soap with an initial H2O content of 20.2 wt% on a dry basis are dried with air in a tunnel dryer at 1 atm. In the limit, if the soap were brought to equilibrium with the air at 25oC and a relative humidity of 20%, determine the kg of moisture evaporated from each block.

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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.