1,Feta cheese is prepared by immersing fresh cheese in brine solution containing
ID: 998606 • Letter: 1
Question
1,Feta cheese is prepared by immersing fresh cheese in brine solution containing 200g/L salt (sodium chloride) and holding it in the brine solution until the salt concentration reaches5 g/100 g product. If the moisture content of feta cheese during brining process remainsconstant at 50% (w/w), calculate the time required for this process if a single block of cheese is acube of 5 inch. The diffusivity of sodium chloride in water is 1.5×10-9 m2/s. Feta cheese does nothave any salt before brining and the brine concentration does not change with time
Explanation / Answer
NaCl dissolve in water or the miisture in the cheese. The area of the cube is 0.127×0.127m^2.
There are 6 faces. Therefore (0.127×0.127×6)/1.5×10^-9
64516000s
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