This bundle of PowerPoints covers IBDP Chemistry R1: What drives chemical reactions? for first examination 2025, including both SL and HL content across energy transfer, enthalpy changes, fuels, entropy and Gibbs energy. It is designed to give teachers and students a complete, well-sequenced set of lessons for teaching the full R1 topic from core foundations through to Higher Level thermodynamics. In IBDP Chemistry, this topic explores the energetic and thermodynamic ideas that explain why react