SVP depends on
temperature. As temperature increases, more molecules are energetic enough to escape
into the air.
Concept
applies to an ice surface. SVP
over ice is lower because water
molecules are bonded more tightly to ice.
For the
temperatures of interest, some water molecules are energetic enough to escape into
atmosphere and SVP>0.
Williams p62
dry E>C
saturatedE=C
warmedE>C
cooled E<C