- #1
gracy
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Homework Statement
Decomposition of 2 moles of NH4NO3 at 100 degrees C.calculate work done
Homework Equations
NH4NO3 (s)→N2O(g)+2H2O (g)
work done= - RT delta n here R=universal gas constant T=temperature in kelvin and
delta n=difference in number of moles of products and reactants.
The Attempt at a Solution
-I pluged in the values in formula work done= - RT delta n=- 8.314j per kelvin per mol×373 kelvin ×3 mol
=- 9303.366 j
I took delta n =3 because i think delta number of moles in solid phase is taken as zero.Even if i don't number of moles in solid phase =0 rather I Take number of moles in solid phase = 1, I will get delta n =2 and then
work done= - RT delta n
=- 8.314 j per kelvin per mol ×373 kelvin ×2 mol
=- 6202.244 j
But according to my textbook answer should be - 18.61kj
please help.[/B]