To find Yolanda's reading rate in chapters per hour, we can divide the total number of chapters she reads by the total number of hours she spends reading.
The calculation is as follows:
\[ \text{Rate} = \frac{\text{Total chapters}}{\text{Total hours}} = \frac{56 \text{ chapters}}{8 \text{ hours}} = 7 \text{ chapters per hour} \]
Therefore, Yolanda's reading rate is 7 chapters per hour.