Determination of partial immersion enthalpy in the interaction of water and activated carbon

A way to calculate the enthalpic contributions of each component of the mixture of activated carbon and water to the immersion enthalpy using the concepts of the solution enthalpies is presented. By determining the immersion enthalpies of a microporous activated carbon in water, with values that are between –18.97 and −27.21 Jg⁻¹, from these and the mass ratio of activated carbon and water, differential enthalpies for the activated carbon, ΔH_DIFacH_{{\rm DIF}_{\rm ac}} and water, ΔH_DIFwH_{{\rm DIF}_{\rm w}} are calculated, and values between –15.95 and –26.81 Jg⁻¹ and between –19.14 and –42.45 Jg⁻¹, respectively are obtained. For low ratios of the mixture, the components’ contributions to the immersion enthalpy of activated carbon and water differ by 3.20 Jg⁻¹.