Answered: Coconut milk was extracted from fresh…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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Question

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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