activity coefficient

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activity coefficient

Number expressing the ratio of a substance's chemical activity to its molar concentration (see mole). The measured concentration of a substance may not be an accurate indicator of its chemical effectiveness as represented by the equation for a particular reaction; in such cases, the activity is calculated by multiplying the concentration by the activity coefficient. In solutions, the activity coefficient is a measure of how much the solution differs from an ideal solution.

activity coefficient [‚ak′tiv·əd·ē ‚kō·ə′fish·ənt]

(physical chemistry)

A characteristic of a quantity expressing the deviation of a solution from ideal thermodynamic behavior; often used in connection with electrolytes.

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No references found			2] is the liquid-phase activity coefficient of solute, [DELTA][H. Solubility of terephthalic acid in the reaction system oligomeric ... by Huang, Hainan; Zeng, Zuoxiang; Xue, Weilan; Zhu, Wanyu / Polymer Engineering and Science 2] x = liquid phase composition y = vapor phase composition Greek Symbols [gamma] = activity coefficient, dimensionless [rho] = density, kg*[m. Cosorption processes of triethylene glycol in a packed-bed liquid ... by Chau, C.K.; Worek, W.M. / HVAC & R Research [+ or -]] is the stoichiometric mean ionic molal activity coefficient of hydrochloric acid, and the other symbols have their usual significance. Treasure of the Past VI: Standard Potential of the ... by Bower, Vincent E. / Journal of Research of the National Institute of Standards and Technology			active termination active tracking system active transducer active transport active vibration suppression active volcano active voltage active window active workings active-cord mechanism active-matrix liquid-crystal display active-RC filter active-RLC filter ActiveMovie ActiveSync ActiveWorks ActiveX ActiveX component ActiveX control ActiveX Data Objects ActiveX Documents ActiveX Server Component ActiveX-enabled browser activity activity chart activity coefficient Activity Cycle activity duration activity level activity ratio activity sampling activity sequence method activity series Activity, Thermodynamic Activity-Recording Apparatus actol actomyosin Acton Acton State Historic Site Acton, John Emerich Edward Dahlberg Acton, 1st Baron Acton, John Emerich Edward Dalberg Acton, 1st Baron Acton, Sir John Francis Edward actophilous ACTOR actor-manager system actor/singer/waiter/webmaster Actors Actors Studio Actors Studio, The Actra ACTS			Activity Based Effectiveness Activity Based Funding Activity Based Information System Activity Based Intelligence Activity Based Management Activity Based Management Activity Based Management Activity Based Management Activity Based Methodology Activity Based Metrics Activity Based Pricing Activity Based Profitability Analysis Activity Based System Activity Bit Activity Calendar and Event Scheduler Activity Capacity Activity Capacity Activity Capacity Activity Capacity Activity Capacity Activity Career Program Manager Activity Center Activity Center for Older Adults Activity Centers Activity Challenge News Room Activity Charge Activity Charges activity chart Activity Chief Information Officer Activity Classification Structure activity coefficient Activity coefficients Activity coefficients Activity coefficients Activity coefficients Activity coefficients Activity Computer Security Plan Activity Coordination Team Activity Cost Assignment Activity Cost Assignments Activity Cost Pool Activity Cost Pool Activity Cycle Activity Data Control System Activity Data Sheet Activity Database Activity Dependent Neuroprotective Protein Activity Dependent Neurotrophic Factors Activity Detail Cost Report Activity Dictionaries Activity Dictionary Activity Director Activity Discard Activity Discard Acknowledgment Activity Distribution Office Activity Driver Activity Driver Analysis Activity Driver Unit activity duration Activity Elements

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