Coconut milk was extracted from fresh coconut flesh. The rheological behavior of coconut milk containing 30% fat was studied and found to obey the power law. Table 1 shows the consistency coefficient (k) and flow behavior index (n) values obtained at different temperatures (data taken from Simuang, Chiewchan, & Tansakul, 2004). Table 1: Consistency Coefficient and Flow Behavior Index of Coconut Milk for Different Temperatures Temperature (°C) k (Pa.sn ) n 25 5.05 x 10-2 0.851 70 4.38 x 10-2 0.739 80 3.80 x 10-2 0.756 90 3.49 x 10-2 0.758 a. Calculate the Arrhenius parameters for the effect of temperature on the apparent viscosity of the coconut milk sample at a shear rate of 300 s−1 b. Comment on i. the significance of the n values ii. the effect of temperature on the flow behavior of coconut milk.

Introduction to Chemical Engineering Thermodynamics
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Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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Coconut milk was extracted from fresh coconut flesh. The rheological behavior of
coconut milk containing 30% fat was studied and found to obey the power law. Table
1 shows the consistency coefficient (k) and flow behavior index (n) values obtained at
different temperatures (data taken from Simuang, Chiewchan, & Tansakul, 2004).
Table 1: Consistency Coefficient and Flow Behavior Index of Coconut Milk
for Different Temperatures
Temperature (°C) k (Pa.sn
) n
25 5.05 x 10-2
0.851
70 4.38 x 10-2
0.739
80 3.80 x 10-2
0.756
90 3.49 x 10-2
0.758

a. Calculate the Arrhenius parameters for the effect of temperature on the
apparent viscosity of the coconut milk sample at a shear rate of 300 s−1
b. Comment on
i. the significance of the n values
ii. the effect of temperature on the flow behavior of coconut milk.

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