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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: esterbunny on August 07, 2008, 03:24:44 AM

Title: Values for Enthalpy
Post by: esterbunny on August 07, 2008, 03:24:44 AM
Hey guys  ;),
I was wondering if I can find the values for enthalpy for reactions somewhere on the internet (I've looked without much luck).

Mg -- > Mg2+ + 2e-

and

Cu2+ + 2e- -- > Cu

Combined:

Mg + Cu2+ -- > Mg2+ + Cu

Any help would be greatly appreciated :)
Title: Re: Values for Enthalpy
Post by: Astrokel on August 07, 2008, 07:43:15 AM
Hey ester bunny!

isn't that ionization energies? or you do not have access to the values, like in data booklet?
Title: Re: Values for Enthalpy
Post by: esterbunny on August 07, 2008, 08:22:58 AM
Quote from: Astrokel on August 07, 2008, 07:43:15 AM
Hey ester bunny!

isn't that ionization energies? or you do not have access to the values, like in data booklet?

What I really need to find out is whether this reaction is endo - or exo - thermic :) But i was hoping to learn how to do this for future reference.
Title: Re: Values for Enthalpy
Post by: Astrokel on August 07, 2008, 09:32:56 AM
hey esterbunny,

do you know that it is a single displacement reaction? Check this out, maybe it helps http://antoine.frostburg.edu/chem/senese/101/thermo/faq/why-are-metal-displacements-exothermic.shtml

You can try to draw up an energy cycle and see for yourself.