Chapter 11.7, Problem 11.13WE

Interpretation Introduction

Interpretation:

The mole fraction of $\text{NO}$ has to be calculated.

Concept introduction:

Ideal gas is the most usually used form of the ideal gas equation, which describes the relationship among the four variables $\text{P, V, n, and T}\text{.}$  An ideal gas is a hypothetical sample of gas whose pressure-volume-temperature behavior is predicted accurately by the ideal gas equation.

                              $\text{PV = nRT}$

• A mole fraction is the unit less proportion of the number of moles of a mixture constituent and the total number of moles in the mixture.
• ${\text{χ}}_{\text{i}}\text{=}\frac{{\text{P}}_{\text{i}}}{{\text{P}}_{\text{total}}}$

To determine: Use the ideal gas equation to calculate the total number of moles in the cylinder. Subtract moles of ${\text{N}}_{\text{2}}$ from the total to determine moles of $\text{NO}$. Divide moles $\text{NO}$ by total moles to get mole fraction