### Delta S = nC In (T2/T1)

Posted:

**Mon Feb 11, 2019 11:48 pm**In the textbook, the equation for delta S = C In (T2/T1), but in Dr. Lavelle's formula booklet, the equation is S = nC In (T2/T1). Im confused about what equation to use?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=133&t=42000

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Posted: **Mon Feb 11, 2019 11:48 pm**

In the textbook, the equation for delta S = C In (T2/T1), but in Dr. Lavelle's formula booklet, the equation is S = nC In (T2/T1). Im confused about what equation to use?

Posted: **Tue Feb 12, 2019 9:39 am**

You should use the equation that has the n in it. The other one is assuming that if you have an amount other than 1 mole you will account for this and multiply by that as well

Posted: **Tue Feb 12, 2019 11:54 am**

The C in the equation from the textbook is most likely referring to the heat capacity, whereas the C in Dr. Lavelle's equation is the molar heat capacity (that's why you have to multiply by the number of moles)