The molar heat of formation of NH_(4)NO_(3)(s) is -367.54 kJand those of N_(2)O(g)and H_(2)O(l)are + 81.46kJand - 285.78 kJ respectively at 25^(@)Cand 1.0 atmospheric pressure. Calculate DeltaHand Delta U for the reaction NH_(4)NO_(3)(s) rarr N_(2)O(g) + 2H_(2)O(l)

The molar heat of formation of NH_(4)NO_(3)(s) is -367.54 kJand those

1.	The molar heat of formation of NH_(4)NO_(3)(s) is -367.54 kJand those of N_(2)O(g)and H_(2)O(l)are + 81.46kJand - 285.78 kJ respectively at 25^(@)Cand 1.0 atmospheric pressure. Calculate DeltaHand Delta U for the reaction NH_(4)NO_(3)(s) rarr N_(2)O(g) + 2H_(2)O(l)
Answer» SOLUTION :`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`