|American electrochemical engineer Libb Thims's 2007 tabulation of the enthalpy components of a human (human enthalpy), attributing the measure largely to physical attributes. |
The enthalpy calculation of humans is a little discussed subject, respectively, say as compared to human entropy or human free energy.
In 1994, citing previous comparisons made by Hungarian physicist Bela Lukacs, Australian organic chemist and commerce theorist James Reiss, in his chapter "Comparative Thermodynamics in Chemistry and Economics", correlated enthalpy to work or labor energy. 
In 2002, German organic chemist Volker Wiskamp, in his "Chemistry in the Work of Goethe", a precipitate of an interdisciplinary high school chemistry course he taught and a similar project which had the focus on science and religion,
discussed "enthalpy of formation" in respect to the passions of Eduard of Goethe's Elective Affinities. 
In the mid-2000s, American electrochemical engineer Libb Thims began to work a human chemical theory on the nature of enthalpy in relation to human chemical reactions, generally correlating enthalpy measure to “heat content” measurements of sexual factors in human relationships, the 2007 formulation result of which is as follows: 
where HAVG is the enthalpy (heat content) associated with the physical attractive trait "averageness" (the most averaged person tends to be the most physically attractive), HAGE with the physical attractive trait age (age 22 for females is the most physically attractive age), HS with the physical attractiveness trait "symmetry" (the most physically symmetric persons tend to be seen as the most attractive), HX with the physical attractiveness associated with the testosterone to estrogen ratio of a given individual (high estrogen women tend to pair with high testosterone men), HL the physical attractiveness associated with one ethnicity, i.e. latitude of development (people tend to be most physically attracted to individuals differing in ethnicity to their own by 15 degrees ± in latitude, as determined experimentally via the Sweaty T-shirt study, i.e. MHC-compatibility complex matching, and in person surveys), HF the physical attractiveness associated with "fitness" (fit people are seen as being more physically attractive than less fit people), and HC the physical attractiveness associated with "complexion" (people with better complex are seen as being more physically attractive).
In 2007, Hungarian astrophysicists Attila Grandpierre, in association with Hungarian physicist Katalin Martinas, in the article “Thermodynamic Measure for Nonequilibrium Processes”, estimated the entropy of a 70-kg human to be 202 KJ/K and on this value estimate the extropy of a human to be 2.31 MJ/K. The calculation, although a good first attempt, is nearly baseless in that its value is ascertained using entropy estimates of things such as glucose and water. In the article, the attempt a calculation of human enthalpy, using data such as the combustion of heat of fat, and use these estimates of S and H, to calculated a human Gibbs free energy G, using the formula G = H - TS (see: human free energy). 
Comparing the Thims and Grandpierre methods of estimating the entropy of humans, there seems to be disjunct between whether or not enthalpy is gauged by combustion heats (e.g. sexual heat) of human chemical reactions or with combustion of lard factors (burning of a human body in a calorimeter)?
1. Reiss, James A. (1994). “Comparative Thermodynamics in Chemistry and Economics”, in: Economics and Thermodynamics: New Perspectives on Economic Analysis (ch. 5, pgs. 47-72) edited by Peter Burley and John Foster. Boston: Kluwer Academic Publishers.
2. (a) Thims, Libb. (2007). Human Chemistry (Volume One) (enthalpy components of the human chemical bond, pgs. 270-72). Morrisville, NC: LuLu.
(b) Thims, Libb. (2007). Human Chemistry (Volume Two) (human enthalpy, pg. 671). Morrisville, NC: LuLu.
3. Martinas, Katalin and Grandpierre, Attilia. (2007). “Thermodynamic Measure for Nonequilibrium Processes”, Interdisciplinary Description of Complex Systems, 5(1): 1-13.
4. Wiskamp, Volker. (2002). “Chemistry in the Work of Goethe” (“Chemie im Werk Goethe”), University of Applied Sciences Darmstadt, Department of Chemistry and Biotechnology.