Table 2 Thermodynamic characteristics of adsorption for MS in 5% HCl at different temperatures.
From: Corrosion inhibition of mild steel in hydrochloric acid solution by the expired Ampicillin drug
Temperature (°C) | Slope | R2 | Kads | ΔG°ads (KJ/mol) | ΔH°ads (KJ/mol) | ΔS°ads (J/mol/K) | ||
|---|---|---|---|---|---|---|---|---|
Langmuir adsorption isotherm | Temkin | Freundlich adsorption isotherm | ||||||
25 | 1.32E + 00 | 1 | 0.942 | 0.948 | 13.7 | − 41.4 | 40.49 | − 0.270 |
35 | 1.29E + 00 | 1 | 0.969 | 0.972 | 17.4 | − 43.39 | 40.49 | − 0.276 |
45 | 1.19E + 00 | 0.9998 | 0.984 | 0.924 | 82.5 | − 48.95 | 40.49 | − 0.295 |
55 | 1.03E + 00 | 1 | 0.730 | 0.730 | 384.6 | − 54.72 | 40.49 | − 0.314 |
