[CHM 330] Question about 3.22 Part B

[Andrew J. Pounds]

On 9/26/22 17:31,  wrote:
> Dear Dr. Pounds,
>
> I'm confused about how to solve question 3.22, Part B. I've used 
> equation 3.12 from the textbook, but I'm still getting it wrong. Am I 
> using the wrong formula?
>
> Sincerely,
>
So in part A you found the standard entropy for the reaction.   In part 
B you are going to need to find the change in the entropy at the higher 
temperature - assuming that the heat capacities don't change.   So 
compute the change in the heat capacity for the reaction just like you 
would compute the change in a state function (products minus reactants, 
weighted by their stoichiometric coefficients).  Call

that quantity Cp,rC_{p,RXN}


Now, using the equation 3.12 and the heat capacity from part A,


ΔSr=ΔSr∘+∫T1T2Cp,rTdT\Delta S_r = \Delta 
S_r^{\circ}+\int_{T_1}^{T_2}\frac{C_{p,r}}{T}dT where T1T_1 is 298 K and 
T2T_2 is the temperature for where you want to compute the entropy change.


-- 
*/Andrew J. Pounds, Ph.D./*
/Professor of Chemistry and Computer Science/
/Director of the Computational Science Program/
/Mercer University, Macon, GA 31207 (478) 301-5627/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://theochem.mercer.edu/pipermail/chm330/attachments/20220926/cf4aeece/attachment.html>