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Hey, Marco interesting question. I looked more into it and in the textbook itself Section 8.10 pg 280-281 it gives the whole explantion on why for constant volume its (3/2)R and for constant pressure its (5/2)R. Hope that helped! and yes I assuming we should know these numbers.
These values are given on the equation sheet on the back of the periodic table we received with the course reader. I think this means that they will likely be given to us on any tests or quizzes, so I don't think we need to memorize them.
I've looked at the corresponding section in the textbook explaining why CP,m=(5/2)R, but I'm still lost on how to obtain the value 20.8 J per mols per degrees C that was in the solutions manual for question 31 from that equation.
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