activity

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  • noun

Synonyms for activity

Synonyms for activity

energetic physical action

Synonyms for activity

any specific behavior

(chemistry) the capacity of a substance to take part in a chemical reaction

a process existing in or produced by nature (rather than by the intent of human beings)

References in periodicals archive ?
The Cd activity coefficient was calculated for a rather low soil solution concentration, but even at this concentration of the solution the influence of the ion association was significant.
The methodology applied takes advantage of a computational model for predicting fugacity and activity coefficients, through SFHS.
Tables 4 and 5 show the calculated values of the mass-based infinite dilution solvent activity coefficients, ([[OMEGA].sub.13.sup.[infinity]]), and the Flory-Huggins interaction parameters ([[chi].sub.13.sup.[infinity]]), for the binary mixtures of both PE and PVAc polymers with the different solvents.
Accurate measurement of activity coefficients at infinite dilution by inert gas stripping and gas chromatography.
In order to have an understanding of those chemically reacting, multi-component, multiphase systems, a brief discussion about the chemical equilibria, vapour--liquid phase equilibria, thermodynamic framework, and activity coefficient model are included, which ensures an appropriate formulation of the objective function.
where E[degrees] is the standard potential of the cell, [[gamma].sub.[+ or -]] is the stoichiometric mean ionic molal activity coefficient of hydrochloric acid, and the other symbols have their usual significance..
The results (thermodynamic quan-tities such as the activity coefficients, Harned interaction coefficients, etc.) of this original research will be compared with those of similar systems such as HCl + [GdCl.sub.3] + H20, and HCl + [EuC1.sub.3] + [H.sub.2]O.
The weight fraction activity coefficient, a|1, of the solute probe at infinite dilution was calculated according to the following equation [5]:
This apparent equilibrium constant is related to the true thermodynamic equilibrium constant, [K.sub.t], via the activity coefficients for the various species present in the molten nylon:
The overestimation of the Faraday's constant was consistent with the use of the Debye-Huckel equation and Davies' equation to predict the activity coefficients of the ions by the speciation program SOILSOLN.
Deshmukh and Mather [10] created a rigorous model, accounting for activity coefficients and fugacity correlations for all ionic species in MEA solutions.
Although previous modeling work that was able to correlate inefficiency with Flory-Huggins parameters appeared to exaggerate the impact of activity coefficients, the activity coefficients considered in this were reasonably close to 1.0.
The activity coefficients in the liquid phase can be calculated by the Non-Random-Two-Liquid (NRTL) model (Lee et al., 2000; Liu and Tan, 2001).
where [(g.sup.GT.sub.K] and [N.sup.GT.sub.Ca] are the respective adsorbed activity coefficients of the K and Ca ions; [N.sub.K] and [N.sub.Ca] are the respective equivalent fractions of [K.sup.+] and [Ca.sup.2+] on the exchanger; [[gamma].sub.K] and [[gamma].sub.Ca] are the activity coefficients of [K.sup.+] and [Ca.sup.2+] in the equilibrium solution; and [M.sub.K] and [M.sub.Ca] are the [K.sup.+] and [Ca.sup.2+] molarities in the equilibrium solution.
Depending on specific retention volumes, V 0, of probes the w ht activity coefficients of solute probes at infinite dilution, 1[?], and Flory-Huggins interaction parameters, , between PCPhDMA-co-St and PCPhDMA-co-AN-solvents were investigated in the range of 413-453 K and 403-453 K, respectively.