What are the theoretical foundations that underpin the field of chemical engineering? Within chemical engineering, theoretical frameworks serve as the bedrock upon which practical applications are built. These foundations encompass a myriad of principles drawn from physics, chemistry, mathematics, and engineering disciplines. Thermodynamics, for instance, provides fundamental laws governing energy transfer and conversion, essential for processes like heat exchangers and reaction kinetics. Fluid mechanics elucidates the behavior of fluids in motion, crucial for designing pipelines and reactors. Transport phenomena delve into the transfer of momentum, heat, and mass, informing the design of separation processes like distillation and filtration. Moreover, chemical kinetics elucidates reaction rates and mechanisms, pivotal for optimizing reaction conditions in various industrial processes. These theoretical underpinnings not only facilitate the understanding of chemical processes but also drive innovation in designing efficient and sustainable solutions to complex engineering challenges.