Partial Differential Equations in Two or More Dimensions

A vertical pipe (25-mm ID), 2 m long, and closed at the bottom contains a 25-cm-deep layer of water at the bottom. The temperature and pressure of the surrounding gas (pure nitrogen) are 21oC and 760 mm Hg respectively. The vapor pressure of water at 21oC is 19 mm Hg. The nitrogen in contact with the open end of the pipe is dry. 1. ................
................