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Science · Grade 10

Energy Changes and Reaction Rates

Learners track energy in reactions: they classify exothermic and endothermic changes from data and energy diagrams, measure heat with q = mcΔT, and estimate enthalpy changes from bond energies. They then explain reaction rates with collision theory and activation energy, analyse gas-volume data and design a fair rate investigation.

  • 4 lessons
  • About 120 minutes
  • Energy and rates check: 10 questions
  • Ways to answer: choose an answer, draw a graph, label a picture, match pairs, type a number and put in order
See plans Included with Family, Teacher and School plans. Open in PlayOwl

What learners will discover

  • Classify reactions as exothermic or endothermic from temperature data and energy diagrams, and explain the energy change with bond breaking and bond forming.
  • Calculate heat transferred with q = mcΔT and estimate reaction enthalpy changes from average bond energies.
  • Explain how temperature, concentration, surface area and catalysts affect reaction rate using collision theory and activation energy.
  • Determine and compare reaction rates from data and graphs, and plan a fair investigation of a rate factor.

Lessons

  1. Exothermic and endothermic changes 6 steps3 practiceabout 28 min
  2. Measuring and estimating energy changes 8 steps5 practiceabout 30 min
  3. Collision theory and rate factors 6 steps3 practiceabout 30 min
  4. Reading rate data and planning investigations 7 steps5 practiceabout 32 min
  5. Energy and rates check 10 questions at the end

Keep exploring

More 10th grade science

Guide for grown-ups