This bundle of PowerPoints covers IBDP Chemistry R1.1 Measuring Enthalpy Changes for first examination 2025, giving students a clear, structured introduction to energy transfer, exothermic and endothermic processes, and calorimetry. It is designed to help students build a strong conceptual and calculation-based foundation in energetics, moving from basic energy ideas to the practical measurement of enthalpy change. In this topic, students learn how energy is transferred during physical and chemi