ammonium nitrate decomposes to N2O and water at temp btw 250c and 300c. what is

Question

ammonium nitrate decomposes to N2O and water at temp btw 250c and 300c. what is the balanced chemical reaction describing the decomposition of ammonium nitrate, and calculate the standard heat of reaction using the appropriate enthalpies of formation

Explanation / Answer

The balanced equation is: NH4NO3 --> N2O + 2 H2O below is the enthalpies of formation. NH4NO3 = -365.1 kJ/mole H2O = -258.8 kJ/mole N2O = +82.05 kJ/mole Total enthalpy of products = 2 * -258.8 + 82.05 = -435.55 kJ/mole Heat of reaction = Enthalpy of reactants – Total enthalpy of products Heat of reaction = -435.55 – -365.1 = -70.45 kJ/mole

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