You can find comprehensive thermodynamics course summaries and solved problems on ResearchGate or F-Legrand Scidoc , which offer free educational PDFs on the principles of thermodynamics.
To help you find this material or something similar, you might consider these options:
While many academic resources are hosted on platforms like Scribd or university repositories such as Bibliothèque de l'Université de Skikda , specific textbooks often require a subscription or purchase due to copyright.
If you are a student, check your university's digital library portal (ENT). They often have licenses for specific scientific publishers.