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The molar heat of formation of NH(4)NO(3...

The molar heat of formation of `NH_(4)NO_(3)(s)` is `-367.5kJ ` and those of `N_(2)O(g)` and `H_(2)O(l)` are `+81.46kJ and -285.78kJ` respectively at `25^(@)C` and 1 atmospheric pressure. Calculate the `DeltaH` and `DeltaU` for the reaction,
`NH_(4)NO_(3)(s)toN_(2)O(g)+2H_(2)O(l)`

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The correct Answer is:
`DeltaH = -122.56;Delta U = - 125. -4 kJ `
`DeltaH_("reaction") =Sigma Delta_(f) H (` Products ) `- Sigma Delta_(f) H(` Reactants)
`Deltan_(g) = n_(p) - n_(r) = 1-0 = 1 `
` Delta U = Delta H - Delta n_(g)RT`
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