Worksheet 4.3 - Potential Energy Diagrams: Analyze the provided diagram to determine if the reaction is endothermic or exothermic, label reactants, products, and activated complex, calculate enthalpy change (ΔH), activation energy (Ea), energy released or absorbed, and energy required for the reaction.

Potential energy diagram showing a reaction pathway with reactants at 50 kJ, a peak at 250 kJ for the activated complex, and products at 100 kJ, illustrating an endothermic reaction.