While direct PDF downloads of copyrighted textbooks are often restricted, you can access Heat Thermodynamics and Statistical Physics " by Brij Lal and N. Subrahmanyam
Online Courses and Lectures: Supplement your learning with online resources such as video lectures on thermodynamics and statistical mechanics from platforms like Coursera, edX, or YouTube. While direct PDF downloads of copyrighted textbooks are
Maxwell’s Distribution of Velocities; Mean Free Path; Transport Phenomena (Viscosity, Thermal Conductivity). Thermal Properties "Thermal Physics" by Reif (University of California): Harder