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# Entropy Change

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Question: The reaction of ammonium nitrate when added to water is endothermic (H=25.7 kJ) and can be written as:
NH4NO3(s) + H2(l) ---> NH4NO3(aq)

a) Determine the heat of formation of NH4HO3(aq).
b) What would be the final temperature of a solution that contained 50 grams of NH4NO3 dissolved in 125 mL of water. Use a specific heat of 4.18 J/(g/°C) for the solution, an initial temp of 25°C and no loss of heat to the surroundings.

https://brainmass.com/chemistry/energetics-and-thermodynamics/entropy-change-22964

#### Solution Preview

A) 1 mole of NH4NO3 = 80 grams
Number of moles of NH4NO3 present = 50/80, so heat transferred = ...

#### Solution Summary

This solution outlines how to solve for both parts of this chemistry based problem and provides the necessary equations and values required to retrieve the answers.This is completed in about 100 words.

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