Thermodynamic parameters for the adsorption of (H1, H2 and H3) derivatives on the C-steel surface in 1 M HCl at different temperatures.

Comp.	Temp., °C	K ads, M−1	, kJ mol−1	, kJ mol−1	, J mol−1 K−1
H1	25	5.67	14.25	48.8	169
	30	6.29	14.75
	35	8.21	15.68
	40	11.33	16.77
	45	20.03	18.55
H2	25	5.38	14.12	40.3	188
	30	5.90	14.59
	35	7.45	15.43
	40	9.80	16.39
	45	15.52	17.87
H3	25	5.67	14.25	48.8	212
	30	6.29	14.75
	35	8.21	15.68
	40	11.33	16.77
	45	20.03	18.55