Energy Diagrams Practice Worksheet + Answer Key

Energy diagrams show up everywhere in chemistry — but most students can only read them, not build them. This worksheet takes students through all three skills: interpreting a diagram, pulling specific values off of it, and drawing one from scratch.

✅ Clear explanation of what an energy diagram shows and how exothermic vs. endothermic reactions differ visually
✅ Part 1: Exothermic vs. Endothermic — all 4 ways to identify a reaction type (by touch, by the sign of ΔH, by calculating ΔH, and by where heat appears in the equation), a fully worked example, and 5 practice diagrams
✅ Part 2: Activation Energy & the Activated Complex — clear definitions, a fully worked example, and 5 diagrams where students identify the energy of the activated complex, activation energy, energy of reactants, and energy of products
✅ Part 3: Drawing Energy Diagrams from Data — 5 problems where students are given the numbers and have to sketch the curve themselves on a labeled grid
✅ 21 custom energy diagrams total, all drawn to scale for accurate reading
✅ Generous work space for every problem
✅ Full answer key, including reference diagrams for every drawing problem
✅ Instant digital download (PDF)