BIOCHEM-ACHIEVE(FIRST DAY DISCOUNTED)
BIOCHEM-ACHIEVE(FIRST DAY DISCOUNTED)
9th Edition
ISBN: 2818000069358
Author: BERG
Publisher: MAC HIGHER
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Chapter 9, Problem 18P
Interpretation Introduction

Interpretation:

The advantage of the specificity of the enzymes from a biological and chemical perspective should be determined. Also, the difficulty to evolve an enzyme with high catalytic activity but low specificity should be determined.

Concept introduction:

Enzymes are biological catalysts that accelerate the rate of chemical reactions. These are used in brewing, culinary, dairy, paper, and starch industries. Some examples of catalysts are erepsin, maltase, and sucrose.

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1. (10 points) Pulverized coal pellets, which may be ° approximated as carbon spheres of radius r = 1 mm, are burned in a pure oxygen atmosphere at 1450 K and 1 atm. Oxygen is transferred to the particle surface by diffusion, where it is consumed in the reaction C + O₂ →> CO₂. The reaction rate is first order and of the form No2 = k₁C₁₂(r), where k₁ = 0.1 m/s. Neglecting changes in r, determine the steady-state O₂ molar consumption rate in kmol/s. At 1450 K, the binary diffusion coefficient for O2 and CO2 is 1.71 x 10ª m²/s.
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