How much energy, in kilojoules, is released or absorbed from the reaction of one mole of nitrogen,
, with three moles of molecular hydrogen,
, to form two moles of ammonia, N
? H-N (bond energy: 389 kJ/mol)
H-H (bond energy: 436 kJ/mol)
N
N (bond energy: 946 kJ/mol)
N
N + H-H + H-H → N
+ N 
A) +899 kJ/mol absorbed
B) -993 kJ/mol released
C) +80 kJ/mol absorbed
D) -80 kj/mol released
Correct Answer:
Verified
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