"What are the key principles of mass transfer in chemical engineering and how do they influence industrial processes? Explain the concept of diffusion and its significance in chemical engineering applications. Discuss the factors affecting the rate of mass transfer and how engineers optimize processes to enhance efficiency. Elaborate on the role of molecular diffusion, convective mass transfer, and interphase mass transfer in various industrial operations. Provide examples to illustrate the importance of mass transfer phenomena in real$-$world applications."