Chapter 5, Problem 51QAP

Interpretation Introduction

(a)

Interpretation:

The partial pressure of oxygen needs to be determined.

Concept introduction:

Dalton’s law of partial pressure will be used, which can be calculated by; that, partial pressure of any substance is equal to the mole fraction of that substance multiplied by the total pressure. It can be given as-

$p_i=p_{\text{total}}\times x_i$

Interpretation Introduction

(b)

Interpretation:

The number of moles of dry gas needs to be determined.

Concept introduction:

Ideal gas equation which holds the characteristic of ideal gas will be used, which can be given as-

$PV=nRT$

$V=\frac{nRT}{P}$

$n=\frac{VP}{RT}$

Number of moles of a gas can be calculated by dividing mass of substance by mass of one mole or molar mass.

$\text{Number of moles=}\frac{\text{mass}}{\text{molar mass}}$

Interpretation Introduction

(c)

Interpretation:

The number of moles of wet gas needs to be determined.

Concept introduction:

Ideal gas will be used to calculate the no. of moles of wet gas. It is given as-

$PV=nRT$

$V=\frac{nRT}{P}$

$n=\frac{VP}{RT}$

Interpretation Introduction

(d)

Interpretation:

The partial pressure of nitrogen in the flask needs to be determined.

Concept introduction:

To calculate the partial pressure mass and molar mass relation and ideal gas law will be used.

Mass and molar mass relation is given as-

$\text{Number of moles=}\frac{\text{mass}}{\text{molar mass}}$

Ideal gas equation for pressure is given as-

$P=\frac{nRT}{V}$

Interpretation Introduction

(e)

Interpretation:

The total pressure in the flask after addition of nitrogen needs to be determined.

Concept introduction:

Ideal gas equation for pressure is given as-

$P=\frac{nRT}{V}$

With the help of ideal gas equation pressure of both gases will be calculated which is added later to calculate total pressure.