O-LevelChemistryRates of Reaction5070/12 · Oct/Nov 2019 · Q141 Mark

Ammonium nitrate dissolves in water. NH4NO3(s) H2O → NH4NO3(aq) ΔH = +25 kJ/mol Which statements are correct? 1 The reaction is endothermic. 2 The water gets colder during the reaction. 3 Heat energy is absorbed by the ammonium nitrate from the water.

A1 and 2 only

B1 and 3 only

C2 and 3 only

D1, 2 and 3

✓ Correct answer

D: 1, 2 and 3

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Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2019 Paper 1 Variant 2, question 14.

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