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  • Year 9
    • C1 Atomic structure
      • Atomic structure - sub-atomic particles
      • Atomic number and Atomic mass
  • GCSE Biology
    • Past Papers
      • MCQ (Multiple Choice Questions)
    • Topic based questions
      • Unit 4.1 Cell biology
      • Unit 4.2 Organisation
      • Unit 4.3 Infection and response
      • Unit 4.4 Bioenergetics
      • Unit 4.5 Homeostasis and response
      • Unit 4.6 Inheritance, variation and evolution
      • Unit 4.7 Ecology
    • Required practicals
  • GCSE Combined Biology
    • Past papers
    • Topic based questions
      • Paper 1
      • Paper 2
    • Required practicals
  • GCSE Combined Chemistry
    • Past papers
    • Topic based questions
      • Unit 5.1 Atomic structure and the periodic table
        • Unit 5.1 Atomic structure
        • Unit 5.1 The periodic table
      • Unit 5.2 Bonding, Structure, and the properties of matter
      • Unit 5.3 Quantitative chemistry (calculations)
        • Calculating Relative Formula Mass
      • Unit 5.4 Chemical changes
        • Unit 5.4 Reactivity of metals
        • Unit 5.4 Reactions of acids
        • Unit 5.4 Electrolysis
      • Unit 5.5 Energy changes
      • Unit 5.6 The rate and extent of chemical change
      • Unit 5.7 Organic chemistry
      • Unit 5.8 Chemical analysis
      • Unit 5.9 Chemistry of the atmosphere
      • Unit 5.10 Using resources
    • Revision
      • Bonding, structure, and the properties of matter
        • 5.2.1.4 Covalent bonding (small molecules)
        • 5.2.2.4 Covalent bonding (properties of small molecules)
        • Retrieval Practice Small / simple molecules
      • Quantitative chemistry
      • Energy changes
        • 5.5.1.1 Energy transfer during exothermic and endothermic reactions
        • 5.5.1.2 Reaction profiles
        • 5.5.1.3 The energy change of reactions (Bond energy calculations)
          • Worked example 2
          • Worked example 3
          • Worked example 4
  • GCSE Chemistry Past Papers
  • GCSE Physics Past papers
  • GCSE Combined Physics Past Papers
ScienceLinks
  • Home
  • Year 9
    • C1 Atomic structure
      • Atomic structure - sub-atomic particles
      • Atomic number and Atomic mass
  • GCSE Biology
    • Past Papers
      • MCQ (Multiple Choice Questions)
    • Topic based questions
      • Unit 4.1 Cell biology
      • Unit 4.2 Organisation
      • Unit 4.3 Infection and response
      • Unit 4.4 Bioenergetics
      • Unit 4.5 Homeostasis and response
      • Unit 4.6 Inheritance, variation and evolution
      • Unit 4.7 Ecology
    • Required practicals
  • GCSE Combined Biology
    • Past papers
    • Topic based questions
      • Paper 1
      • Paper 2
    • Required practicals
  • GCSE Combined Chemistry
    • Past papers
    • Topic based questions
      • Unit 5.1 Atomic structure and the periodic table
        • Unit 5.1 Atomic structure
        • Unit 5.1 The periodic table
      • Unit 5.2 Bonding, Structure, and the properties of matter
      • Unit 5.3 Quantitative chemistry (calculations)
        • Calculating Relative Formula Mass
      • Unit 5.4 Chemical changes
        • Unit 5.4 Reactivity of metals
        • Unit 5.4 Reactions of acids
        • Unit 5.4 Electrolysis
      • Unit 5.5 Energy changes
      • Unit 5.6 The rate and extent of chemical change
      • Unit 5.7 Organic chemistry
      • Unit 5.8 Chemical analysis
      • Unit 5.9 Chemistry of the atmosphere
      • Unit 5.10 Using resources
    • Revision
      • Bonding, structure, and the properties of matter
        • 5.2.1.4 Covalent bonding (small molecules)
        • 5.2.2.4 Covalent bonding (properties of small molecules)
        • Retrieval Practice Small / simple molecules
      • Quantitative chemistry
      • Energy changes
        • 5.5.1.1 Energy transfer during exothermic and endothermic reactions
        • 5.5.1.2 Reaction profiles
        • 5.5.1.3 The energy change of reactions (Bond energy calculations)
          • Worked example 2
          • Worked example 3
          • Worked example 4
  • GCSE Chemistry Past Papers
  • GCSE Physics Past papers
  • GCSE Combined Physics Past Papers
  • More
    • Home
    • Year 9
      • C1 Atomic structure
        • Atomic structure - sub-atomic particles
        • Atomic number and Atomic mass
    • GCSE Biology
      • Past Papers
        • MCQ (Multiple Choice Questions)
      • Topic based questions
        • Unit 4.1 Cell biology
        • Unit 4.2 Organisation
        • Unit 4.3 Infection and response
        • Unit 4.4 Bioenergetics
        • Unit 4.5 Homeostasis and response
        • Unit 4.6 Inheritance, variation and evolution
        • Unit 4.7 Ecology
      • Required practicals
    • GCSE Combined Biology
      • Past papers
      • Topic based questions
        • Paper 1
        • Paper 2
      • Required practicals
    • GCSE Combined Chemistry
      • Past papers
      • Topic based questions
        • Unit 5.1 Atomic structure and the periodic table
          • Unit 5.1 Atomic structure
          • Unit 5.1 The periodic table
        • Unit 5.2 Bonding, Structure, and the properties of matter
        • Unit 5.3 Quantitative chemistry (calculations)
          • Calculating Relative Formula Mass
        • Unit 5.4 Chemical changes
          • Unit 5.4 Reactivity of metals
          • Unit 5.4 Reactions of acids
          • Unit 5.4 Electrolysis
        • Unit 5.5 Energy changes
        • Unit 5.6 The rate and extent of chemical change
        • Unit 5.7 Organic chemistry
        • Unit 5.8 Chemical analysis
        • Unit 5.9 Chemistry of the atmosphere
        • Unit 5.10 Using resources
      • Revision
        • Bonding, structure, and the properties of matter
          • 5.2.1.4 Covalent bonding (small molecules)
          • 5.2.2.4 Covalent bonding (properties of small molecules)
          • Retrieval Practice Small / simple molecules
        • Quantitative chemistry
        • Energy changes
          • 5.5.1.1 Energy transfer during exothermic and endothermic reactions
          • 5.5.1.2 Reaction profiles
          • 5.5.1.3 The energy change of reactions (Bond energy calculations)
            • Worked example 2
            • Worked example 3
            • Worked example 4
    • GCSE Chemistry Past Papers
    • GCSE Physics Past papers
    • GCSE Combined Physics Past Papers

5.5.1.1 Energy transfer during exothermic and endothermic reactions

5.5.1.2 Reaction profiles

5.5.1.3 The energy change of reactions (Bond energy calculations)

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