Dissolution of LiCl•3H2O in LiCl solution

[gfd43tg]

A liquid solution of LiCl in water at 25 C contains 1 mole of LiCl and 7 moles of water. If 1 mole of LiCl•3H2O is dissolved isothermally in this solution, what is the heat effect?


Here is my attempt with a relevant table and graph, but I wonder if my net equation represents the situation and if my intermediate reactions are okay. I just made the intermediates arranged to get the final equation the way I wanted. I can't really say how every intermediate reaction is representing the physical situation

Here is my attempt

 

[gfd43tg]

edited to put all photos on one post. I wish the phone app could flip the photos around instead of having to go onto my laptop

 

[Borek]

I don't think you have to care about whole Hess cycle. Why don't you read heat of dissolution (from the plot) for both solutions as if they were prepared from water and anhydrous LiCl, and just subtract one from another?