[CHM 111] Problems with Pre-lab

[Andrew J. Pounds]

It has come to my attention that some of you are having problems with 
the second part of the prelab.  The mass of the solution after you add 
the sodium hydroxide should be 102 grams plus the mass of the sodium 
hydroxide.  You need to look in the lab procedures and report form to 
find the heat capacity of the resulting solution.  Once you find the 
heat via

$q = m c_s \Delta T$


divide by the heat by the moles of sodium hydroxide to find the 
enthalpy.  Remember that it is exothermic -- so use the correct sign.


-- 
Andrew J. Pounds, Ph.D.  (pounds_aj at mercer.edu)
Professor of Chemistry and Computer Science
Mercer University,  Macon, GA 31207   (478) 301-5627
http://faculty.mercer.edu/pounds_aj

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