The reason as to why nitrogen gas is commonly used as purge gas in IR spectroscopy is to be stated. Concept introduction: Disturbance is caused by the impurities in the IR spectrum of the sample. These impurities are generally the gases present in the environment. For example, water vapor and carbon dioxide. Purging is the process of removal of unwanted impurities present in the form of gas in the sample.

Question

20. The Brusselator. This hypothetical system was first proposed by a group work- ing in Brussels [see Prigogine and Lefever (1968)] in connection with spatially nonuniform chemical patterns. Because certain steps involve trimolecular reac tions, it is not a model of any real chemical system but rather a prototype that has been studied extensively. The reaction steps are A-X. B+X-Y+D. 2X+ Y-3X, X-E. 305 It is assumed that concentrations of A, B, D, and E are kept artificially con stant so that only X and Y vary with time. (a) Show that if all rate constants are chosen appropriately, the equations de scribing a Brusselator are: dt A-(B+ 1)x + x²y, dy =Bx-x²y. di

Answer 1

Question

Chapter 14, Problem 14.57E

Interpretation Introduction

Interpretation:

The reason as to why nitrogen gas is commonly used as purge gas in IR spectroscopy is to be stated.

Concept introduction:

Disturbance is caused by the impurities in the IR spectrum of the sample. These impurities are generally the gases present in the environment. For example, water vapor and carbon dioxide. Purging is the process of removal of unwanted impurities present in the form of gas in the sample.

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20. The Brusselator. This hypothetical system was first proposed by a group work- ing in Brussels [see Prigogine and Lefever (1968)] in connection with spatially nonuniform chemical patterns. Because certain steps involve trimolecular reac tions, it is not a model of any real chemical system but rather a prototype that has been studied extensively. The reaction steps are A-X. B+X-Y+D. 2X+ Y-3X, X-E. 305 It is assumed that concentrations of A, B, D, and E are kept artificially con stant so that only X and Y vary with time. (a) Show that if all rate constants are chosen appropriately, the equations de scribing a Brusselator are: dt A-(B+ 1)x + x²y, dy =Bx-x²y. di

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