Sharing copyrighted solution manuals without permission violates most university academic integrity policies. Use them only as a check after attempting problems yourself.
The solution manual for "Fisicoquímica" by Engel is available in PDF format. However, I must clarify that I won't be able to provide you with a direct download link or the actual PDF file, as that would likely infringe on copyright laws. fisicoquimica engel solucionario pdf upd