Chapter 4, Problem 4D.11E

(a)

Interpretation Introduction

Interpretation:

The heat absorbed in the formation of $1.55molNO$ has to be determined.

Concept Introduction:

Hess’s law is defined as the law which states that the enthalpy of a reaction does not depend on the path followed by reaction.  It depends only on the standard enthalpy of formations for estimating the enthalpy of a reaction.  The standard enthalpy of reaction that is ${\Delta }_{\text{r}}H°$ is the enthalpy of the reaction which involves pure reactants and pure products in their standard states at a particular temperature.

(b)

Interpretation Introduction

Interpretation:

The heat absorbed in the oxidation of $5.45L$ of nitrogen has to be determined.

Concept Introduction:

Same as part (a).

(c)

Interpretation Introduction

Interpretation:

The mass of nitrogen gas when oxidation of $N_2$ was completed has to be determined.

Concept Introduction:

Same as part (a).