Example: Sulfacetamide degradation presents a pH-rate profile U-shaped. The first order constant in the pH independent zone (5-11) is 9 x 10-6 s-1 at 120° C. The activation energy is 22.9 kcal mol -1 at pH 7.4. Calculate the retest period at 25° C. R= 8,314 JK-¹mol-1 1 cal = 4,1868 J H₂N ZI

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Sulfacetamide degradation presents a pH-rate profile U-shaped.
The first order constant in the pH independent zone (5-11) is
9 x 10-6 s-1 at 120° C. The activation energy is 22.9 kcal mol
-1 at pH 7.4.
Calculate the retest period at 25° C.
R= 8,314 JK-¹mol-1
1 cal = 4,1868 J
H₂N
ZI
Transcribed Image Text:Example: Sulfacetamide degradation presents a pH-rate profile U-shaped. The first order constant in the pH independent zone (5-11) is 9 x 10-6 s-1 at 120° C. The activation energy is 22.9 kcal mol -1 at pH 7.4. Calculate the retest period at 25° C. R= 8,314 JK-¹mol-1 1 cal = 4,1868 J H₂N ZI
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