4C.3 7th Edition

[klarratt2]

I'm doing this problem but in the back of the book there is only one answer when the question asks for final temperature and change in enthalpy for two separate parts (parts a and b). Is this a mistake? What are the answers to this question?

[Venya Vaddi 1L]

For part a: delta H is 765 J and the final temp is 343 K.
for part b: delta H is 1275 J and the final temp is 373 K.