plumiEnthalpy changes, exothermic and endothermic: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 6.1.1 Enthalpy changes, exothermic and endothermic, 2019–2025, with mark schemes and examiner’s reports where available.
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Open the full PDFYour answerQ4(d)(iv)
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Open the full PDFYour answerQ18(a)(iii)
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Open the full PDFYour answerQ10(a)
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All 11 questions on Enthalpy changes, exothermic and endothermic, as a list
- June 2024, AS Unit 2, Q1 (1 mark): An enthalpy level diagram for a reaction with an intermediate is shown. intermediate C B D Enthalpy A products reactants Progress of reaction Which arrow shows
- June 2024, AS Unit 3, Q4(d)(iv) (1 mark): State why the data will not result in the standard molar enthalpy change of neutralisation being calculated. (1)
- June 2023, AS Unit 2, Q1 (1 mark): The enthalpy level diagram for a reaction is shown. reactants ∆H Enthalpy products Progress of reaction Which is represented by this diagram? A Na(s) → Na(g) B
- January 2023, AS Unit 2, Q22(e)(ii) (1 mark): Suggest why only a small amount of energy is used to maintain the temperature at 1100 K. (1)
- October 2022, Unit 4, Q6(b) (1 mark): Which of these statements best explains why only a small amount of energy is required to maintain this process? (1) A the catalyst increases the equilibrium yie
- June 2022, AS Unit 2, Q18(a)(iii) (2 marks): Draw a labelled enthalpy level diagram for the complete combustion of 2,2,4-trimethylpentane. (2)
- January 2022, AS Unit 2, Q24(e)(ii) (3 marks): Sketch the reaction profile for the forward reaction on the axes provided. Include labels for ΔH and the activation energy (Ea). Energy Reaction progress (3)
- June 2021, AS Unit 2, Q1 (1 mark): Which is the correctly labelled reaction profile for an exothermic reaction? Enthalpy Ea Reactants A ∆H Products Reaction pathway Enthalpy ∆H Reactants B Ea Pro
- October 2020, AS Unit 2, Q2 (1 mark): The standard enthalpy change of neutralisation for the reaction between sodium hydroxide solution and hydrochloric acid is –56 kJ mol–1. Which row in the table
- October 2020, AS Unit 2, Q10(a) (1 mark): Which symbol represents the enthalpy change for the reaction R → P? (1) A u B v C w D x
- October 2020, AS Unit 2, Q10(b) (1 mark): Which symbol represents the activation energy of the reaction P → R? (1) A u B v C w D x
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