Chapter 5, Problem 5.65QE

Draw an energy-level diagram (e.g., see Figure 5.6) based on each of the following thermochemical equations. Label each level with the amounts of substances present, and use an arrow between levels for the given enthalpy change. (Do not show the reverse process on the diagram.)

1. (a) $\begin{array}{l}\text{C}\left(\text{s,graphite}\right)+{\text{H}}_{\text{2}}\text{O}\left(\text{g}\right)\to \text{CO}\left(\text{g}\right)+{\text{H}}_{\text{2}}\left(\text{g}\right)\\ \Delta H=+131.3\text{kJ}\end{array}$
2. (b) $\begin{array}{l}\text{CO}\left(\text{g}\right)+{\text{H}}_{\text{2}}\text{O}\left(\text{g}\right)\to {\text{CO}}_{\text{2}}\left(\text{g}\right)+{\text{H}}_{\text{2}}\left(\text{g}\right)\\ \Delta H=-41.2\text{kJ}\end{array}$
3. (c) $\begin{array}{l}2{\text{SO}}_{\text{2}}\left(\text{g}\right)+{\text{O}}_2\to 2{\text{SO}}_{\text{3}}\left(\text{g}\right)\\ \Delta H=-197.8\text{kJ}\end{array}$