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Enthalpy Change for Dissolution

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In a coffee-cup calorimeter, 1.10 g of NH4NO3 is mixed with 76.0 g of water at an initial temperature of 25.00°C. After dissolution of the salt, the final temperature of the calorimeter contents is 23.93°C. Assuming the solution has a heat capacity of 4.18 J/C/g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.

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Solution Summary

This solution provides step-by-step equations and breakdown to find heat energy absorbed in the dissolution and molecular weight to find change in enthalpy.

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m1 = mass of NH4NO3 = 1.10 g
m2 = mass of water = 76 g
T1 = initial temperature = 25.00 C
T2 = final temeperature = 23.93 ...

Solution provided by:
Amrit Lal Ahuja, PhD (IP)
Education
  • BEng, Allahabad University, India
  • MSc , Pune University, India
  • PhD (IP), Pune University, India
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