Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

A 10g sample of neon gas has 1700J of thermal energy. Estimate the average speed of a neon atom.

Short Answer

Expert verified

The average spped of a neon atom isvavg=580m/s

Step by step solution

01

Step :1 Introduction 

TThe gravitational potential between atoms is 0 in the micro system, and the total energy of a monatomic gas equals translational kinetic energy.. As a result, a monatomic gas's thermal energy is Natoms is given by equation (20.27in the form

Eth=Nϵavg

Where ϵavgis the average energy. The molecule with mass mand velocity vhas a translational kinetic energy on average The average translational kinetic energy of a molecule is affected by its temperature, hence it is related to the temperature per molecule in the form.

ϵavg=12mvavg2

Where KBis Boltzmann's constant and in SIunit its value is

kB=1.38×1023J/K

Knowing the mass Mand the molar mass m, we can get the number of molecules by

N=Mm

02

Step : 2 Explanation 

Use this expressions of Nand ϵavg into equation (1) to get an expression for vavg2

Eth=Nϵavg

=Mm12mvavg2

=12Mvavg2

03

Step :3 Substitution 

Solve equation

(3) for vavgand use the values forMand Eth

vavg=2EthM

=2(1700J)0.01kg

=580m/s

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 Vaia!

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

Equation 20.3is the mean free path of a particle through a gas of identical particles of equal radius. An electron can be thought of as a point particle with zero radius.

a. Find an expression for the mean free path of an electron through a gas.

b. Electrons travel 3kmthrough the Stanford Linear Accelerator. In order for scattering losses to be negligible, the pressure inside the accelerator tube must be reduced to the point where the mean free path is at least 50km. What is the maximum possible pressure inside the accelerator tube, assuming T=20°C?Give your answer in both Paand atm.

At what temperature does thermsspeed of (a)a nitrogen molecule and (b)a hydrogen molecule equal the escape speed from the earth's surface? (c)You'll find that these temperatures are very high, so you might think that the earth's gravity could easily contain both gases. But not all molecules move withVrms. There is a distribution of speeds, and a small percentage of molecules have speeds several times Vrms . Bit by bit, a gas can slowly leak out of the atmosphere as its fastest molecules escape. A reasonable rule of thumb is that the earth's gravity can contain a gas only if the average translational kinetic energy per molecule is less than 1%of the kinetic energy needed to escape. Use this rule to show why the earth's atmosphere contains nitrogen but not hydrogen, even though hydrogen is the most abundant element in the universe.

In the discussion following Equation 20.43 it was said that Q1=-Q2. Prove that this is so.

A 6.0m×8.0m×3.0m room contains air at 20OC. What is the room's thermal energy?

The rms speed of the atoms in a 2.0g sample of helium gas is 700m/s. What is the thermal energy of the gas?

See all solutions

Recommended explanations on Physics Textbooks

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.

Sign-up for free