ThermochemistryHard

Question

A coffee cup calorimeter initially contains 125 g of water, at a temperature of 24.20C. 8g of ammonium nitrate (NH4NO3), also at 24.2oC, is added to the water, and the final temperature is 18.2oC. what is the heat of solution of ammonium nitrate in kJ/mol ? The specific heat capacity of the solution is 4.2 J/oC g.

Options

A.33.51 kJ/mol
B.39.5 kJ/mol
C.32.2 kJ/mol
D.37.3 kJ/mol

Solution

ᐃHsolution = × 80 = 33516 J/mol or 33.51 kJ/mol.

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