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15. A 500L reactor initially holds 200L of a solution containing A. "A" decomposes into "B" by the following equation: with the rate of A decomposition being given by: RA = -kc. where k is in min. Throughout this problem, the reactor is well-mixed and the concentrations of A and B are sufficiently low so that all solution densities are identical. Inadvertently, a batch of material is made without any A. Thus, after the reactor has been operating at steady-state for some time, stream 1 suddenly shifts to a solution having no A. How much time will pass before the concentration of A in the reactor decreases below 10 mmol/L? A. less than 5 min B. 5- 10 min C. 10– 20 min D. 20- 30 min E. More than 30 min

15. A 500L reactor initially holds 200L of a solution containing A. "A" decomposes into "B" by the following equation: with the rate of A decomposition being given by: RA = -kc. where k is in min. Throughout this problem, the reactor is well-mixed and the concentrations of A and B are sufficiently low so that all solution densities are identical. Inadvertently, a batch of material is made without any A. Thus, after the reactor has been operating at steady-state for some time, stream 1 suddenly shifts to a solution having no A. How much time will pass before the concentration of A in the reactor decreases below 10 mmol/L? A. less than 5 min B. 5- 10 min C. 10– 20 min D. 20- 30 min E. More than 30 min

Introduction to Chemical Engineering Thermodynamics
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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15. A 500L reactor initially holds 200L of a solution containing A. "A" decomposes into "B" by the following equation: with the rate of A decomposition being given by: RA = -kc. where k is in min. Throughout this problem, the reactor is well-mixed and the concentrations of A and B are sufficiently low so that all solution densities are identical. Inadvertently, a batch of material is made without any A. Thus, after the reactor has been operating at steady-state for some time, stream 1 suddenly shifts to a solution having no A. How much time will pass before the concentration of A in the reactor decreases below 10 mmol/L? A. less than 5 min B. 5- 10 min C. 10– 20 min D. 20- 30 min E. More than 30 min
Transcribed Image Text:15. A 500L reactor initially holds 200L of a solution containing A. "A" decomposes into "B" by the following equation: with the rate of A decomposition being given by: RA = -kc. where k is in min. Throughout this problem, the reactor is well-mixed and the concentrations of A and B are sufficiently low so that all solution densities are identical. Inadvertently, a batch of material is made without any A. Thus, after the reactor has been operating at steady-state for some time, stream 1 suddenly shifts to a solution having no A. How much time will pass before the concentration of A in the reactor decreases below 10 mmol/L? A. less than 5 min B. 5- 10 min C. 10– 20 min D. 20- 30 min E. More than 30 min
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