$\textit{Specific Enthalpy}$ is enthalpy per mass of substance involved. Specific enthalpy is denoted by a lower case h, with dimension of energy per mass (SI unit: joule/kg). In thermodynamics, $\textit{enthalpy}$ is the sum of the internal energy U and the product of pressure p and volume V of a system: $H = U + pV$. The internal energy U and the work term pV have dimension of energy, in SI units this is joule; the extensive (linear in size) quantity H has the same dimension.
Applicable units are those of quantitykind:SpecificEnergy
http://en.citizendium.org/wiki/Enthalpy
http://dbpedia.org/resource/Entropy
$h = H/m$, where $H$ is enthalpy and $m$ is mass.
http://www.iso.org/iso/catalogue_detail?csnumber=31890