/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q36P Why is longitudinal diffusion a ... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 23: Q36P (page 631)

Why is longitudinal diffusion a more serious problem in gas chromatography than in liquid chromatography?

Short Answer

Expert verified

The solution is

longitudinal diffusion in gas chromatography would be substantially faster than in liquid chromatography.

Step by step solution

01

of 3

We will discuss why longitudinal diffusion is a more serious issue in gas chromatography than it is in liquid chromatography in this task.

02

of 3

Longitudinal diffusion

a band's diffusional widening that is most noticeable below the optimum linear velocity.

03

of 3

Gases have diffusion coefficients that are104 times greater than liquid diffusion coefficients, as we know.

- As a result, longitudinal diffusion in gas chromatography would be substantially faster than in liquid chromatography.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

23-32. Chromatograms of compounds A and B were obtained at the same flow rate with two columns of equal length. The value of tmis 1.3m in both cases.


(a) Which column has more theoretical plates?

(b) Which column has a larger plate height?

(c) Which column gives higher resolution?

(d) Which column gives a greater relative retention?

(e) Which compound has a higher retention factor?

(f) Which compound has a greater partition coefficient?

(g) What is the numerical value of the retention factor of peak A?

(h) What is the numerical value of the retention factor of peak B?

(i) What is the numerical value of the relative retention?

The retention volume of a solute is 76.2mL for a column withVm=16.6mL andVs=12.7mL . Calculate the retention factor and the partition coefficient for this solute.

When performing liquid-liquid extraction, it is common practice to shake the separatory funnel to disperse one phase into the other.

(a) Does shaking the separatory funnel change the partition coefficient?

(b) Explain the purpose of shaking the funnel.

Why does plate height depend on linear velocity, not volume flow rate?

For the separation of A and B by column 2 in Problem 23-32:

(a) If broadening is mainly due to longitudinal diffusion, how should the flow rate be changed to improve the resolution?

(b) If broadening is mainly due to the finite equilibrium time, how should the flow rate be changed to improve the resolution?

(c) If broadening is mainly due to multiple flow paths, what effect will flow rate have on the resolution?
See all solutions

Recommended explanations on Chemistry Textbooks

Chemical Analysis

Read Explanation

Organic Chemistry

Read Explanation

Ionic and Molecular Compounds

Read Explanation

The Earths Atmosphere

Read Explanation

Physical Chemistry

Read Explanation

Chemistry Branches

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.