Abstract
Adsorptions of neutral salts and acids by polyamide were studied by measuring the heat using a flow type micro calorimeter. The adsorption heat of neutral salts was comparable to that of acids. The approximately equal heats were observed for salts having the same anion. The salt prevented the acid from adsorption owing to the electrical effect. When a salt was replaced by an acid on polyamide, the heat was certainly detected. By the replacement with another salt, however, the heat was hardly detected. The affinity of adsorption of proton was large. The entropy of adsorption was positive and large. The plots of -ΔH°ion against -ΔH°hy-ion and the plots of ΔS°ion, against Δδion were linear for a series of halogen ions.
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