Understanding Enthalpy and Enthalpy Change | Exothermic & Endothermic Reactions Explained

In this lecture, we explore the concept of enthalpy (H) and enthalpy change (ΔH) — key ideas in thermodynamics and chemical reactions. You’ll learn: • What enthalpy is and why it matters • How to define and calculate enthalpy change (ΔH) • The differences between exothermic and endothermic reactions • Real-life examples of each type of reaction • How to interpret energy level diagrams and reaction profiles This session is ideal for students preparing for O level, matric , or introductory thermodynamics courses.