   Chapter 13, Problem 145AP ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

#### Solutions

Chapter
Section ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
349 views

# onsider the flasks in the following diagrams.mg src=Images/HTML_99425-13-145AP_image001.jpg alt="" align="top"/> Which is greater, the initial pressure of helium or the initial pressure of neon? How much greater? Assuming the connecting tube has negligible volume. Draw what each diagram will look like after the stopcock between the two flasks is opened. Solve for the final partial pressures of helium and neon in terms of their original pressures. Assume the temperature is constant. Solve for the final pressure in terms of the original pressures. of helium and neon. Assume temperature is constant.

Interpretation Introduction

(a)

Interpretation:

The greater pressure between the initial pressure of helium and the initial pressure of neon should be determined.

Concept Introduction:

Pressure of a given mass of gas at a particular temperature is defined as the force exerted per unit area of the walls of the container by colliding gas molecules.

Explanation

According to ideal gas law,

PV=nRT

Here, P is pressure, V is volume, R is Universal gas constant and n is number of moles.

At constant temperature,

P=nV

For helium gas, V=X, n=6

Therefore, PHe=6X

For neon gas, V=X and

Interpretation Introduction

(b)

Interpretation:

The diagram of the set-up after the stopcock between the two flasks opened should be drawn.

Concept Introduction:

At a given temperature and pressure, equal volumes of gases contain same number of moles of gas molecules.

Interpretation Introduction

(c)

Interpretation:

The final partial pressures of helium and neon in terms of their original pressures should be determined.

Concept Introduction:

The pressure exerted by one gas in a gaseous mixture when it occupies the same volume of the gas mixture is known as the partial pressure.

Interpretation Introduction

(d)

Interpretation:

The final pressures in terms of the original pressures of helium and neon should be determined.

Concept Introduction:

At constant temperature, volume of a given mass of gas is inversely proportional to its pressure.

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