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Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

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BuyFindarrow_forward

Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909
Textbook Problem

Which of the following states that the rate of gas diffusion is inversely proportional to the weight of the gas?

A. Graham’s law

B. Charles’ law

C. Henry’s law

D. Gay-Lussac’s law

Summary Introduction

Introduction:

In a mixture of gases, every gas exerts a specific pressure on the other gases. This pressure is called the partial pressure of that gas. The movement of a gas molecule from the area of its high concentration to the area of its low concentration is gas diffusion. The best example of diffusion is seen in the alveolar-capillary system where oxygen moves from its high concentration zone (alveolar space) to its low concentration zone (capillary blood). The difference between the partial pressures of individual gases is called the diffusion gradient.

Explanation

Justification/ Explanation for the correct answer:

Option (A) is, ‘Graham’s law’. This law stated that the rate of diffusion of a gas is proportional to the solubility coefficient and the square root of gram-molecular weight. This proportionality is direct for solubility coefficient and indirect for gram-molecular weight. This means, an increasing in molecular weight will result in a decreased rate of diffusion. Hence, option (A) is correct.

Explanation for the incorrect answers:

Option (B) is, ‘Henry’s law’. This law states that when a gas at a given temperature dissolves in a liquid, the amount of the gas is proportional to the partial pressure of the gas...

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