When a 4.25-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter, the temperature drops from 22.0 ∘C to 16.9 ∘C.   Calculate ΔH (in kJ/mol NH4NO3) for the solution process NH4NO3(s)→NH+4(aq)+NO−3(aq) Assume that the specific heat of the solution is the same as that of pure water. Express your answer to two significant figures and include the appropriate units.

Question

When a 4.25-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorimeter, the temperature drops from 22.0 ∘C to 16.9 ∘C.

 

Calculate ΔH (in kJ/mol NH4NO3) for the solution process

NH4NO3(s)→NH+4(aq)+NO−3(aq)

Assume that the specific heat of the solution is the same as that of pure water.

Express your answer to two significant figures and include the appropriate units.
 

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