   # Consider three identical flasks filled with different gases. Flask A: CO at 760 torr and 0°C Flask B: N 2 at 250 torr and 0°C Flask C: H 2 at 100 torr and 0°C a. In which flask will the molecules have the greatest average kinetic energy? b. In which flask will the molecules have the greatest average velocity? ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

#### Solutions

Chapter
Section ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 8, Problem 109E
Textbook Problem
1970 views

## Consider three identical flasks filled with different gases.Flask A: CO at 760 torr and 0°CFlask B: N2 at 250 torr and 0°CFlask C: H2 at 100 torr and 0°Ca. In which flask will the molecules have the greatest average kinetic energy?b. In which flask will the molecules have the greatest average velocity?

Interpretation Introduction

Interpretation: For a given three different gases container, average kinetic energy, average velocity needed to be determined.

Concept introduction:

• Kinetic molecular theory explains the properties of ideal gas. From the postulates of kinetic molecular theory it is clear that kinetic energy of gas particle is directly proportional to the Kelvin temperature of the gas.

Average kinetic energy of gas can be determined as,  KEavg=(3/2)RT

• The average  velocity can be determined,

Cave=(8RTπM)1/2 (1)

R=8.314JKmolM=Molarmassinkg

### Explanation of Solution

Explanation

• To find: Which gas sample has the largest average kinetic energy

KEavg is same for all gases

From the postulates of kinetic molecular theory it is clear that kinetic energy of gas particle is directly proportional to the Kelvin temperature of the gas. Here in the case of three containers the temperature inside the three containers is same. Since the average kinetic energy is temperature dependent it must be same in each container.

• To find: which gas sample has the greatest average velocity

Flask C; H2 gas has greatest average velocity

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