   # Which of the following is not correct? (a) Diffusion of gases occurs more rapidly at higher temperatures. (b) Effusion of H 2 is faster than effusion of He (assume similar conditions and a rate expressed in units of mol/h). (c) Diffusion will occur faster at low pressure than at high pressure. (d) The rate of effusion of a gas (mol/h) is directly proportional to molar mass. ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 10, Problem 81GQ
Textbook Problem
39 views

## Which of the following is not correct? (a) Diffusion of gases occurs more rapidly at higher temperatures. (b) Effusion of H2 is faster than effusion of He (assume similar conditions and a rate expressed in units of mol/h). (c) Diffusion will occur faster at low pressure than at high pressure. (d) The rate of effusion of a gas (mol/h) is directly proportional to molar mass.

Interpretation Introduction

Interpretation:

From the given set of statements that defines effusion and diffusion the incorrect statement should be determined.

Concept introduction:

Effusion:

The movement of gas particles through a small hole is defined as effusion.  The rate of effusion for a gas is inversely proportional to the square root of the mass of gas particles.

The root mean square velocity μ is defined as the measure of velocity of particle in gas.  It is the method to determine the single velocity value for particles.

Root mean square velocity can be determined,

μrms=(3RTM)1/2 (1)

(gas constant)R=8.314JKmolM=Molarmass

Molar mass: The molar mass of a substance is determined by dividing the given mass of substance by the amount of the substance.

### Explanation of Solution

From the definition and the given expression for the effusion it is clear that effusion is directly proportional to the temperature but not the mass of the gas.

It is actually indirectly proportional to the molar mass that is as the molar mass increases the effusion rate becomes smaller...

### Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

#### The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Find more solutions based on key concepts
Distinguish between a measured number and an exact number. Give examples of each.

General Chemistry - Standalone book (MindTap Course List)

Which orbital is the first be filled in any atom? Why?

Introductory Chemistry: A Foundation

To plan a healthy diet that correctly assigns the needed amounts of food from each food group, the diet planner...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

6.45 Define the term shielding.

Chemistry for Engineering Students

Why don’t red dwarfs become giant stars?

Horizons: Exploring the Universe (MindTap Course List)

Match the term listed in Column A with its definition from Column B

Nutrition Through the Life Cycle (MindTap Course List)

What is a coastal cell? Where does sand in a coastal cell come from? Where does it go?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin

Review. A 30.0-g metal hall having net charge Q = 5.00 C is thrown out of a window horizontally north at a spee...

Physics for Scientists and Engineers, Technology Update (No access codes included) 