Summary of Important Concepts

Problem 1-1 (Level 1) A group of researchers is studying the kinetics of the reaction of hydrogen with thiophene (QH4S). They have postulated that oriy one stoichiometrically simple reaction takes place, as shown below. 

In one expoiment, the feed to a continuous reactor operating at steady state was 

Are the experimental data consistent with the assumption that only one stoichiometrically simple reaction (i.e., the above reaction) takes place  

Problon 1-2 (Level 2) A continuous reactor operating at steady state is being used to study the formation of methanol (CH3OH) from mixtures of H2 and CO according to the reaction 

Some data from one particular run are shown below. 

This section contains an algebra-free summary of some of the more important concepts discussed in more detail in the following sections. Together with the list of symbols used in the algebraic development (given at the end of the chapter) this summary should hopefully provide a useful forest without the trees view of chromatographic theory. A sketch of an archetypal 

K partition coefficient for analyte A defines the ratio of equilibrium concentrations of A between stationary and mobile phases (Equation [3.1]). 

Theoretical plate a concept borrowed from distillation theory and countercurrent extraction a chromatographic column is modeled as a series of discrete plates in each of which local equilibrium of analyte partitioning between stationary and mobile phases is established. The Plate Theory accounts for retention of analytes, i.e., retention times, but not the peak shapes (widths), for isocratic elution. 

Isocratic elution elution using a mobile phase of fixed composition (compare gradient elution ). 

Laminar flow sometimes known as streamline flow , this type of flow of a liquid or gas occurs when the fluid flows in parallel layers, with no macroscopic disruption between the layers (exchange at the molecular level via diffusion can still occur), in accord with the Poiseuille Equation for flow through a tube of radius r, (,g and length /t be (volume flow rate U = ir.rube/8-i1-/ be)- where y is the viscosity coefficient of the fluid laminar flow is to be contrasted with turbulent flow. 

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A Summary of Important Concepts that Come From Quantum Mechanics... 

A Summary of Important Concepts That Come from Quantum Mechanics 43... 

A SUMMARY OF IMPORTANT CONCEPTS THAT COME FROM QUANTUM MECHANICS... 

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