Naturally Occurring Elettaria cardamomum Extract as a Corrosion Inhibitor for the Dissolution of Zinc in 1.0 M HCl

Table 4

Activation parameters of the dissolution reaction of zinc in 1.0 M HCl in the absence and presence of 500 ppm of inhibitor.

System	𝐸𝑎 (kJ mol^−1)	Δ𝐻^∗ (kJ mol^−1)	Δ𝑆^∗ (J mol^−1)
1.0 M HCl	9.832	16.12	−209.355
1.0 M HCl + 500 ppm inhibitor	14.768	25.12	−216.105