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Given the Bond Enthalpies N N (946),H-H (436),H-N (389),all

Question 87

Multiple Choice

Given the bond enthalpies N Given the bond enthalpies N N (946) ,H-H (436) ,H-N (389) ,all in kJ/mol,estimate ΔH° for the following reaction: N<sub>2</sub>(g) + 3 H<sub>2</sub>(g) → 2NH<sub>3</sub>(g) . A) -215 kJ/mol B) -863 kJ/mol C) -80 kJ/mol D) 568 kJ/mol E) -1476 kJ/mol N (946) ,H-H (436) ,H-N (389) ,all in kJ/mol,estimate ΔH° for the following reaction:
N2(g) + 3 H2(g) → 2NH3(g) .


A) -215 kJ/mol
B) -863 kJ/mol
C) -80 kJ/mol
D) 568 kJ/mol
E) -1476 kJ/mol

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