In science, surface chemistry is the study, at both the microscopic and macroscopic levels, of how atoms and molecules interact with surfaces, how they behave, and why they react. [1] Being that human chemical reactions, i.e. reactions between human molecules, generally occur on a surface, surface chemistry will invariably yield better models of human behavior than models in gas-phase or liquid-phase chemistry. [2]

See also
● Surface thermodynamics

References
1. McCase, Elaine M. (2001). Surface Chemistry. USA: Oxford University Press.
2. (a) Thims, Libb. (2007). Human Chemistry (Volume One), (preview). Morrisville, NC: LuLu.
(b) Thims, Libb. (2007). Human Chemistry (Volume Two), (preview). Morrisville, NC: LuLu.