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[" .The standard enthalphy of formation ...

[" .The standard enthalphy of formation of "NH_(3)" is "-46.0kJmol],[" ind that of "N_(2)" is "-712kJmol^(-1)" ,the average bond enthalpy of "N-1],[" 1) "-1102kJmol^(-1)],[" 2) "-964kJmol^(-1)],[" 3) "+352kJmol^(-1)],[" 4) "+1056kJmol^(-1)]

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