Surface Tension: Adhesion & Cohesion

This lecture covers the concepts of surface tension, adhesion, cohesion, and intermolecular forces. It explains how the surface energy of a substance is related to its latent heat and boiling point, with examples ranging from metals to liquids like water and mercury. The lecture also delves into the work of adhesion and cohesion, detailing the reversible work done to separate two surfaces or media in vacuum. Additionally, it discusses the contact angle, surface energies of different materials, and the Young equation, which governs the equilibrium condition of liquid-vapor and liquid-solid surfaces.