Given : N_(2)(g) + 3H_(2)(g)rarr2NH_(3)(g), Delta_(r)H^(@) +- 92.4 kJ mol^(-1).What is the standard enthalpy of formation of NH_(3) gas ?

Given : N_(2)(g) + 3H_(2)(g)rarr2NH_(3)(g), Delta_(r)H^(@) +- 92.4 kJ

1.	Given : N_(2)(g) + 3H_(2)(g)rarr2NH_(3)(g), Delta_(r)H^(@) +- 92.4 kJ mol^(-1).What is the standard enthalpy of formation of NH_(3) gas ?
Answer» Solution :Reaction for the enthalpy of `NH_(3)(G) ` is `:(1)/(2) N_(2)(g) +(3)/(2) H_(2)(g) rarr NH_(3)(g)` `:. Delta_(F)H^(@) = - 92.4//2 = - 46.2 kJ MOL^(-1)`