Bond Energy Calculations - AQA GCSE Chemistry Calculation Practice Book

Bond energy calculations are a reliable source of marks on Paper 2, but students mix up "bonds broken" and "bonds formed" almost every time. This AQA GCSE Triple Chemistry workbook fixes that with 12 scaffolded questions using the EVERY method framework.

The EVERY method breaks each calculation into clear steps: Equation, Values, Enter values into the equation, Rearrange if needed, Your units. Every question has a structured EVERY table for students to complete, building a consistent problem-solving habit. Questions get progressively harder: Q1-3 are straightforward, Q4-6 introduce unit conversions, and Q7-12 require rearranging the formula.

What's inside:

- 12 progressive questions on Bond Energy Calculations (overall energy change = bonds broken - bonds formed)

- Structured EVERY method table on every question page

- Progressive difficulty: simple substitution, then unit conversions, then rearranging

- Self-assessment tracker with "What made me stuck?" reflection checklist

- Full worked answers for all 12 questions using the EVERY method steps

AQA specification reference: 5.5 Energy Changes (Triple Chemistry only, higher tier)

Bond energy calculations require students to identify all the bonds broken in reactants and all the bonds formed in products, sum each using bond energy values from a data table, and subtract to find the overall energy change. A positive result means endothermic; negative means exothermic.

Common student mistakes this workbook addresses: subtracting the wrong way round (formed minus broken instead of broken minus formed), not counting all the bonds (especially in molecules like O2 which has a double bond), forgetting to multiply bond energy by the number of that bond type, and misidentifying whether the reaction is exothermic or endothermic from the sign.

Suitable for AQA GCSE Chemistry (Triple only, higher tier).

Visit advisoryscience.com for more science teaching resources.