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Ignore slight changes in values, I'm using a different set of steam tables.
Enthalpy of Water (hf) 417.547
Enthalpy of Evaporation (hfg) 2257.63
Enthalpy of Steam (hg) 2675.18
hf + hfg = hg
hfg (AKA Heat of Vaporization) is the energy you have to add to saturated liquid to change it into saturated gas. It's the enthalphy of the phase change, not of any particular state of matter. On some older references the subscript is actually "f→g" (that's supposed to be a little arrow)... somewhere along the way it just became "fg", which leads to confusion occassionally.
In short... coming out the other end you have Water and Steam... not Water (noun) and Evaporation (verb).
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Simple Machines in Higher Dimensions
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