heat of wetting
heat of wetting[′hēt əv ′wed·iŋ]
The heat of adsorption of water on a substance.
The additional heat required, above the heat of vaporization of free water, to evaporate water from a substance in which it has been absorbed.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.