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lianna [129]
3 years ago
5

3. The molar heat of solution for ammonium nitrate (NH 4 NO 3 ) is 25.7 kJ/mol.

Chemistry
1 answer:
Karo-lina-s [1.5K]3 years ago
7 0

Answer:

<u><em></em></u>

  • <u><em>3.42 moles</em></u>

Explanation:

By the law of conservation of  energy, assuming no losses of heat to the surroundings, <em>the amount of heat consumed by the dissolution of the ammonium nitrate is equal to the amount of heat released from the water.</em>  This is, the ammonium nitrate absorbs all the heat it needs to break the ions apart and get dissolved from the water in which it is being dissolved.

Thus:

  • 88.0kJ        =         n                    ×          25.7 kJ/mol

         ↑                           ↑                                        ↑

heat released      number of moles             molar heat of solution

from water           of NH₄NO₃                        for NH₄NO₃

Solve for n and compute:

  • n = 88.0kJ / (25.7kJ/mol) = 3.42 moles ← answer
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