Chapter 4, Problem 4.98P

Interpretation Introduction

(a)

Interpretation:

The percentages by mass of moisture and fixed carbon, volatile matter and ash in a coal should be calculated.

Concept introduction:

Mass is defined as,

$m=n\left(M\right)$

Where, m = mass, n = moles, M = molar mass

Mole fraction is defined as,

$x=\frac{n_A}{n_A+n_B}$

Where, x = mole fraction, nA and nB are moles of A and B.

Interpretation Introduction

(b)

Interpretation:

Calculate the gram-moles of air for the given case.

Concept introduction:

Mass is defined as,

$m=n\left(M\right)$

Where, m = mass, n = moles, M = molar mass

Mole fraction is defined as,

$x=\frac{n_A}{n_A+n_B}$

Where, x = mole fraction, nA and nB are moles of A and B.