Explore the fundamental concepts of surface tension and the crucial role of surfactants in this comprehensive lecture. Delve into the physics and chemistry behind surface tension, understanding its effects on liquids and how it impacts various biological and industrial processes. Learn about the properties and functions of surfactants, including their ability to reduce surface tension and their applications in fields such as medicine, cleaning products, and environmental science. Gain insights into the molecular interactions that govern surface tension and how surfactants modify these interactions. Discover real-world examples and practical applications of surface tension and surfactants, enhancing your understanding of these essential concepts in physical chemistry and biochemistry.