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3.2 Energetics

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Question 14
F

On the reaction profile for a reaction, the reactants are at 120 kJ/mol, the top of the peak is at 170 kJ/mol and the products are at 50 kJ/mol.

Statement 1: The activation energy is 50 kJ/mol.

Statement 2: The reaction transfers 70 kJ/mol of energy to the surroundings.

Statement 3: The activation energy of the reverse reaction is 70 kJ/mol.

Statement 4: The temperature of the surroundings increases during the reaction.

Which statements are correct?

[1]
A

1 and 2 only

B

2, 3 and 4 only

C

1, 2 and 4 only

D

1, 3 and 4 only

Markscheme

3.2 Energetics Questions

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

51 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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