While looking for a "free PDF," you can find legitimate digital versions and supplementary materials through educational and library archives:
Aunque no tengas el archivo, puedes replicar su método de estudio con recursos gratuitos:
Frequently hosts community-uploaded versions of the Spanish edition ( Ingeniería Termodinámica Academia.edu A common spot for shared academic PDFs and research papers. If you're struggling with the math, look for the Solutions Manual