you should watch videos in order (1 , 2 , 3 ,4 , 5 ,6 .......) to easily solve any problem in Thermodynamics and fully textbook concepts. you can watch at 1.25 speed The name of each video title is similar to the name of the book chapter. and number such as (20) before the video name shows that it is the 20th video on thermodynamics - | Remember Use the handsfree for better understanding because these lectures contain depth and complete knowledge to clear your doubts book name Thermodynamics: An Engineering Approach by Y. A. Cengel and M. A. Boles, Fifth Edition. or any other edition