Calculate Standard Enthalpy Change?

stevegongrui

Hi,

I don't know how many of you are chemists, but I need to design an experiment to determie the standard enthalpy change of the hydration of Copper II Sulfate.



I'm running into a little trouble because the copper II sulfate and hydrated copper sulfate are both solids and if there is any excess water, the hydrated copper sulfate will dissolve.



Here's the reaction:

CuSO4(s)+5H2O(l)-> CuSO4*5H2O



Any Ideas are welcome

klinux

Got my degree in chemistry from Cornell University alas it was too long ago (six years!). Doesn't sound like a hard problem though. Sorry that I can't help.

stevegongrui

[quote]Originally posted by klinux:

<strong>Got my degree in chemistry from Cornell University alas it was too long ago (six years!). Doesn't sound like a hard problem though. Sorry that I can't help.</strong><hr></blockquote>



You went to Cornell?

I'm in my senior year of high school and I've just sent out my early decision application there!

Any tips as to how to get in??



What the hell? Just six years and you don't remember? Did you attend the College of Agriculture and Sciences?



Reply.

toadie

Go here:



<a href="http://www.carolina.com/chemistry/activities/Determining_Molar_Enthalpy_of_Solution.pdf"; target="_blank">http://www.carolina.com/chemistry/activities/Determining_Molar_Enthalpy_of_Solution.pdf</a>;



You can determine it by changes in heat.



Good luck.



-T

telomar

Molar enthalpy of solution is different to molar enthalpy of hydration. Solution is easy but it allows for the dissociation of the ions and the energy associated with it.



I'll get back to you on this one. The only method I can think of probably isn't practical for you.

klinux

[quote]Originally posted by stevegongrui:

<strong>



You went to Cornell?

I'm in my senior year of high school and I've just sent out my early decision application there!

Any tips as to how to get in??



What the hell? Just six years and you don't remember? Did you attend the College of Agriculture and Sciences?



Reply. </strong><hr></blockquote>



Good luck with Cornell. I interview candidates here in SoCal and just talked with an admission director last weekend.



First, going with ED is a good idea. Your chance is much much higher. Second, if it is not too late, take opportunities to say why you like Cornell e.g. you want to take Hoffeman's class or you heard that there is a glass-blowing class in the chemistry department (becuase when you do really advanced stuff, some of the equipment you need is just not available commercially, etc).



I enjoyed my time at Cornell. PM me if you have any questions.



FYI, I finished my degree requirement in Asian Studies in junior year and decided to stay another year and finished my chem degree. Orgo sucks. No wonder I don't remember much.



I am now in IT industry - nothing to do with chemistry.

stevegongrui

Although your proposals weren't of much help, thanks anyway.



I managed to work out a way to calculate it using Hess' Law. I submitted my lab on fri, hope it's correct.





Klinux: I sent you a private message but you haven't read it yet. Go check!