Repeat Problem 7-80 for a horizontal space filled with water. Problem 7-80 A horizontal air space is

Question:

Repeat Problem 7-80 for a horizontal space filled with water.
Problem 7-80
A horizontal air space is separated by a distance of 1.6 mm. Estimate the heat-transfer rate per unit area for a temperature difference of 165oC, with one plate temperature at 90oC.