A-LevelChemistryChemical energetics9701/12 · May/June 2013 · Q101 Mark
Use of the Data Booklet is relevant to this question. A student mixed 25 cm³ of 0.10 moldm⁻³ sodium hydroxide solution with 25 cm³ of 0.10 moldm⁻³ hydrochloric acid and noted a temperature rise of 2.5°C. What is the enthalpy change of the reaction per mole of NaOH?
A-209 kJ mol⁻¹
B-104.5 kJ mol⁻¹
C-209 J mol⁻¹
D-522.5 J mol⁻¹
✓ Correct answer
A: -209 kJ mol⁻¹
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