Chapter 4, Problem 4D.15E

Interpretation Introduction

Interpretation:

The reaction enthalpy for the hydrogenation of ethyne to ethane 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.