Cabbage containing $89\%$ of moisture is to be dried in air at $65C$ down to a moisture

content on a dry basis of $5\%.$ Calculate $($a$)$ the heat energy required per tonne of raw

cabbage and $($b$)$ per tonne of dried cabbage, for the drying. Ignore the sensible heat and

assume the water evaporates at $65C.$

$($a$)2{10}^{6}kJ,($b$)\{$:$1\mathrm{.}73{10}^7(kJ))$