A-LevelChemistryChemical energetics9701/12 · Oct/Nov 2012 · Q51 Mark

In the table below, • '+' means that this type of standard enthalpy change can only have positive values, • '-' means that this type of standard enthalpy change can only have negative values, • '+/-' means that either positive or negative values are possible. Which row is correct?

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Aatomisation: +, formation: +, solution: +/-

Batomisation: +, formation: +/-, solution: +/-

Catomisation: -, formation: +/-, solution: -

Datomisation: -, formation: -, solution: +

✓ Correct answer

B: atomisation: +, formation: +/-, solution: +/-

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Topic: Chemical energetics, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2012 Paper 1 Variant 2, question 5.

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