Chapter 5, Problem 96E

Interpretation Introduction

Interpretation:

The partial pressure of nitrous oxide ( ${\text{N}}_{\text{2}}\text{O}$) and oxygen should be determined if equimolar nitrous oxide and oxygen have a total pressure of $\text{2}\text{.50atm}$.

Concept introduction:

• Partial pressure of a gas in a mixture of gases is the pressure of that gas when it alone.

  Partial pressure of a gas in terms of its mole fraction and total pressure is,

  `

${\text{P}}_{\text{A}}\text{=}{\text{χ}}_{\text{A}}\text{×}{\text{P}}_{\text{TOTAL}}$

A mole fraction of a molecule in a mixture is the ratio of number of moles of particular molecule to the sum of number of moles of all molecules in the mixture.

• Equation for mole fraction of a molecule in a mixture of two molecules (A and B) is,

  $\text{molecule}\text{fraction}\text{of}\text{A,}\text{(}{\text{χ}}_{\text{A}}\text{) }\text{=}\frac{\text{numbers}\text{of moles of}\text{molecule A}{\text{(n}}_{\text{A}}\text{)}}{\text{total number of moles}{\text{(n}}_{\text{A}}{\text{+n}}_{\text{B}}\text{) }}$