What is the chemical activity of a subtance

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beastamaine
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What is the chemical activity of a subtance

Post by beastamaine » Wed Dec 03, 2008 11:36 pm

i know what it is im just having trouble think or some examples for it if you guys know any websites or just know any examples please post them also so nobody says im just trying to get a answer it is the ability of a substance to undergo a chemical change

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mith
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Post by mith » Thu Dec 04, 2008 12:36 am

fire
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

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MichaelXY
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Post by MichaelXY » Thu Dec 04, 2008 8:22 am

bang....

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jonmoulton
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Re: What is the chemical activity of a subtance

Post by jonmoulton » Thu Dec 04, 2008 6:32 pm

The activity is a term used in physical chemistry to describe the apparent concentration of a compound; this is needed because real compounds do not behave quite like their ideals (e.g. ideal gasses) when their thermodynamic parameters are measured and related by thermodynamic equations, e.g. those for equilibrium or free energy. The activity is like a "corrected" concentration. I'm digging back to my thermo class for this, which is decades past. Look at a chemical thermodynamics text for a rigorous explanation.

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