We analyze the adsorption of 101 furan chemistry-related adsorbates, including intermediates with varying levels of hydrogenation of the furan ring as well as ring-open compounds, on Pd(111). The standard heat of formation (Hf,298), standard absolute entropy (S298), and heat capacity (Cp,T) are estimated using dispersion-corrected density functional theory (DFT-D3) and statistical mechanics formulas, and all Hf,298 values are referenced to a single set of gas-phase molecules to ensure consistency. We further estimate the dispersion contribution, ΔEdisp, to the heat of adsorption. Subsequently, we develop a group additivity scheme to quickly estimate thermochemical properties of furanic molecules. For the proposed model, the vibrational and rotational contributions of gas-phase-like groups are estimated using G4-level calculations. We find that the group additivity scheme developed for open-chain molecules is inaccurate for furanics. We report 17 new groups, involving heteroatom–nearest neighbor interactio...