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Browse all science resourcesBuild Hess cycles using formation data and connect the cycle to a systematic calculation method. Students track species, coefficients, values and signs, then compare routes to the same enthalpy change.
Use combustion data to calculate reaction enthalpy and explain the direction of the subtraction from the energy cycle. Students distinguish formation and combustion methods before choosing a calculation route.
Construct Born-Haber cycles from individual energy steps. Students connect atomisation, bond dissociation, ionisation, electron affinity and lattice enthalpy, checking species, states and signs throughout.
Calculate unknown energy changes using Born-Haber cycles and a step-by-step audit. Students then explain lattice-enthalpy trends using ionic charge and size, linking quantitative results to structure.
Convert calorimetry measurements into molar enthalpy changes through neutralisation, dissolution and combustion examples. Students check solution or water mass, reacting moles, energy units and the physical meaning of the sign.
Evaluate why experimental enthalpy values differ from accepted data. Students analyse heat transfer, apparatus heating, incomplete combustion and evaporation, then use cooling-curve extrapolation and justify practical improvements.
Use hot and cold reactions to distinguish the system from its surroundings, explain energy conservation, and classify endothermic and exothermic changes.
Connect thermometer observations, energy-transfer directions and energy profiles. Students practise the sign of enthalpy change, enthalpic stability, graph interpretation and error correction.
Build Q = mcΔT from scaling arguments, interpret specific heat capacity and practise calorimetry calculations with consistent units. The lesson also introduces standard-state conventions and experimental assumptions.
Students analyse artworks, compare artistic and descriptive accounts and reflect on the emotional, experiential, formal and cultural knowledge the arts can convey.
