Chapter 14, Problem 14.67P

Interpretation Introduction

Interpretation:

The process occurs in a boiling water system has to be determined.

Concept Introduction:

Thermodynamics is a study of energy transfers that can be done by either heat or work. The energy transferred through work involves force. When work is positive then system gains energy while when work is negative then system loses energy. Since energy as heat is not state function thus it order to find change in energy produced or evolved, change in enthalpy of reaction $\Delta H{°}_{\text{rxn}}$ as a state function has been introduced. The expression to calculate $\Delta H{°}_{\text{rxn}}$ is as follows:

  $\Delta H_{\text{rxn}}=H_{\text{prod}}-H_{\text{react}}$

The enthalpy of reaction can also be given by molar bond enthalpies. The standard enthalpy of reaction is given as follows:

  $\Delta H{°}_{\text{rxn}}=H_{\text{bond}}\left[\text{reactants}\right]–H_{\text{bond}}\left[\text{products}\right]$