   Chapter 15, Problem 10CR ### 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
1 views

# Dalton’s law of partial pressures concerns the properties of mixtures of gases. What is meant by the partial pressure of an individual gas in a mixture? How does the total pressure of a gaseous mixture depend on the partial pressures of the individual gases in the mixture? How does Dalton’s law help us realize that in an ideal gas sample, the volume of the individual molecules is insignificant compared with the bulk volume of the sample?

Interpretation Introduction

Interpretation:

The meaning of partial pressure of an individual gas in a mixture is to be stated. The dependence of the total pressure of a gaseous mixture on the partial pressures of the individual gases in the mixture is to be stated. How Dalton’s law helps to realize that in an ideal gas sample, the volume of the individual molecules is significant compared with the bulk volume of the sample is to be stated.

Concept Introduction:

The partial pressure of a gas can be defined as the total pressure exerted by all the gases in the container multiplied by their mole fraction.

Suppose two gases A and B are in a container and the partial pressure of A can be calculated as,

Pa=nana+nb×P

Where

• Pa is the partial pressure of gas A.
• na is the number of moles of A.
• nb is the number of moles of B.
• P is the total pressure in the container.
Explanation

The partial pressure of a gas can be defined as the pressure of a constituent gas present in mixture of gases occupying the entire volume of the mixture.

The partial pressure of a gas can be defined as the total pressure exerted by all the gases in the container multiplied by their mole fraction.

Suppose two gases A and B are in a container and the partial pressure of A can be calculated as:

Pa=nana+nb×P

Where

• Pa is the partial pressure of gas A.
• na is the number of moles of A.
• nb is the number of moles of B.
• P is the total pressure in the container.

Similarly, it can be used to calculate pressure of gas B.

The total pressure is thus the sum of the individual partial pressure of the gases

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