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3.2 Energetics

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Question 11

A student investigates two reactions. The temperatures are recorded in the table.

ReactionStarting temperatureFinal temperature
A21.0 ∘C21.0\ ^\circ\text{C}21.0 ∘C28.5 ∘C28.5\ ^\circ\text{C}28.5 ∘C
B20.5 ∘C20.5\ ^\circ\text{C}20.5 ∘C16.0 ∘C16.0\ ^\circ\text{C}16.0 ∘C

Calculate the temperature change for each reaction. State which reaction is endothermic and explain your answer.

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Markscheme

3.2 Energetics Questions

  1. GCSE
  2. /Chemistry
  3. /3.2 Energetics

106 exam-style questions on OCR GCSE Chemistry 3.2 Energetics, covering 3.2.1 Exothermic and endothermic reactions and reaction profiles and 3.2.2 Calculating energy change from bond energies. Each one has a worked solution and a mark scheme showing where the marks go.

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