November 27, 2015

Homework Help: Chemistry

Posted by Ezra on Saturday, November 3, 2012 at 3:54pm.

Consider the gas-phase transfer of an electron from a sodium atom to a chlorine atom:


I was able to write the reaction that relates to an ionization energy and that relates to an electron affinity.

I broke it up into:
Na(g)--> Na^(+)+e^(-)
Cl(g)+ e^(-)--> Cl^(-)(g)
Which was correct, but I'm having trouble with how I'm supposed to use these equations to calculate the enthalpy of the above reaction. I have to use Hess's Law and then some given data but I don't know which.

How should I approach this problem? Explanation would be great, thanks.

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