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Chapter 13: Q49PE (page 471)

Question: Dry air is 78.1% nitrogen. What is the partial pressure of nitrogen when the atmospheric pressure is 1.01脳105 N/m2?

Short Answer

Expert verified

Answer

The partial pressure of nitrogen is 7.89脳104N/m2

Step by step solution

01

Introduction

We apply the formula for partial pressure which is to find partial pressure by multiplying nitrogen percentage by total pressure.

02

Given parameters and formula for partial pressure

Total pressure = Atmospheric pressure =1.01脳105N/m2

Percentage of nitrogen =78.1%

The formula for partial pressure Ppartial=% Nitrogen100脳Ptotal

Here, Ppartial partial pressure and Ptotal total pressure.

03

Calculate the partial pressure

The partial pressure of nitrogen in the atmosphere

Ppartial=%Nitrogen100脳PtotalPpartial=78.1(1.01脳105N/m2)100脳Ptotal=7.89脳104N/m2

Therefore, partial pressure of nitrogen is \({\rm{7}}{\rm{.89 \times 1}}{{\rm{0}}^{\rm{4}}}\;{\rm{N/}}{{\rm{m}}^{\rm{2}}}\)

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