Chapter 4, Problem 4D.1E

(a)

Interpretation Introduction

Interpretation:

The quantity of heat absorbed in the reaction of $\text{1}\text{.25 mole}$ of ${\text{S}}_{\text{8}}$, at constant pressure, is to be determined.

Concept Introduction:

The heat required for a given amount of the substance in the reaction, is calculated according to the heat required for a fixed quantity, that is, 1 mole of the substance.  This value is fixed at standard conditions, for any given reaction.

(b)

Interpretation Introduction

Interpretation:

The heat absorbed in the reaction of $\text{197 g}$ of carbon with an excess of sulfur is to be determined.

Concept Introduction:

Refer to part (a).

(c)

Interpretation Introduction

Interpretation:

The mass of ${\text{CS}}_{\text{2}}$ produced is to be calculated.

Concept Introduction:

Refer to part (a).