Problems & Step-by-Step Video Solutions

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Chemistry Problems and Solutions on Videos. This section covers problems specifically about: Enthalpy and calorimetry, in the area of: Thermochemistry and the First Law of Thermodynamics.
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06 02 01

When a 4.25-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter, the temperature decreases from 22.06 oC to 16.9 oC.  Calculate DH (in kJ/mol NH4OH) for the solution process:

NH4OH (s) → NH4+ (aq) + OH- (aq)

Assume that the specific heat capacity of the solution is 4.22 J/g/K.
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