1. Solve Problem 8.109a using the effectiveness-NTU method.
2. Consider Problem 7.113. Estimate the heat transfer rate to the air, accounting for both the increase in the air temperature as it flows through the foam and the thermal resistance associated with conduction in the foam in the x-direction. Do you expect the actual heat transfer rate to the air to be equal to, less than, or greater than the value you have calculated?