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A total of 80.0 g of ammonium nitrate is added to a beaker that contains 100...

A total of 80.0 g of ammonium nitrate is added to a beaker that contains 100 mL of water. The solution is stirred and the temperature of the solution changes from 23.5 oC to 1.42 oC .Please be specfic and explain each answer choice, why it's wrong or why its right.

The dissolution process was:

a. Exothermic

b. Endothermic

c. Not enough information

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