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An orange juice is thermally processed for determining ascorbic acid degradation kinetics. After different temperature experiments, the following ascorbic acid concentration values were obtained:       Ascorbic Acid (mg/L) Processing Time (second)     0 15 30 60 90 120 Temperature (oC) 75 558.3 546.5 535 526.5 519.6 508.6 85 608.6 595.2 587.4 572.7 557.5 542.3 95 612.6 601.5 588.2 546.1 521.8 509.5     According to the results; Determine ascorbic acid degradation order Derive the equations related to the degradation order (general equation and t1/2) Calculate k-values at the constant processing temperatures Calculate activation energy (Ea) of the degradation reaction Calculate half-life time of ascorbic acid for all processing (For better evaluation, add figures for the addressed questions, if necessary)

An orange juice is thermally processed for determining ascorbic acid degradation kinetics. After different temperature experiments, the following ascorbic acid concentration values were obtained:       Ascorbic Acid (mg/L) Processing Time (second)     0 15 30 60 90 120 Temperature (oC) 75 558.3 546.5 535 526.5 519.6 508.6 85 608.6 595.2 587.4 572.7 557.5 542.3 95 612.6 601.5 588.2 546.1 521.8 509.5     According to the results; Determine ascorbic acid degradation order Derive the equations related to the degradation order (general equation and t1/2) Calculate k-values at the constant processing temperatures Calculate activation energy (Ea) of the degradation reaction Calculate half-life time of ascorbic acid for all processing (For better evaluation, add figures for the addressed questions, if necessary)

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter18: Chemical Kinetics
Section: Chapter Questions
Problem 75AP
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An orange juice is thermally processed for determining ascorbic acid degradation kinetics. After different temperature experiments, the following ascorbic acid concentration values were obtained:

 

 

 

Ascorbic Acid (mg/L)

Processing Time (second)

 

 

0

15

30

60

90

120

Temperature (oC)

75

558.3

546.5

535

526.5

519.6

508.6

85

608.6

595.2

587.4

572.7

557.5

542.3

95

612.6

601.5

588.2

546.1

521.8

509.5

 

 

According to the results;

  1. Determine ascorbic acid degradation order
  2. Derive the equations related to the degradation order (general equation and t1/2)
  3. Calculate k-values at the constant processing temperatures
  4. Calculate activation energy (Ea) of the degradation reaction
  5. Calculate half-life time of ascorbic acid for all processing

(For better evaluation, add figures for the addressed questions, if necessary)

                                                                                                                             

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