Results of the fits to the submonolayer H₂S ice data. Each row corresponds to a different H₂S ice thickness: ∼0.6, ∼0.5, ∼0.3, and ∼0.2 ML (from top to bottom). Left panels: TPD curves, with the experimental data in gray and the fits with a linear combination of first-order Polanyi-Wigner equations in red. Right panels: corresponding binding energy distribution: normalized fractional coverages are shown as a functional of the binding energy (gray histogram), superimposed by a Gaussian fit to the distribution (dashed red line).