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How Much Energy, in Kilojoules, Is Released or Absorbed from the Reaction

Question 77

Multiple Choice

How much energy, in kilojoules, is released or absorbed from the reaction of one mole of nitrogen, N2, with three moles of molecular hydrogen, H2, to form two moles of ammonia, NH3? H-N (bond energy: 389 kJ/mol)
H-H (bond energy: 436 kJ/mol)
N How much energy, in kilojoules, is released or absorbed from the reaction of one mole of nitrogen, N<sub>2</sub>, with three moles of molecular hydrogen, H<sub>2</sub>, to form two moles of ammonia, NH<sub>3</sub>? 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 H<sub>3</sub> + N H<sub>3</sub> A) +899 kJ/mol absorbed B) -993 kJ/mol released C) +80 kJ/mol absorbed D) -80 kj/mol released N (bond energy: 946 kJ/mol)
N How much energy, in kilojoules, is released or absorbed from the reaction of one mole of nitrogen, N<sub>2</sub>, with three moles of molecular hydrogen, H<sub>2</sub>, to form two moles of ammonia, NH<sub>3</sub>? 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 H<sub>3</sub> + N H<sub>3</sub> A) +899 kJ/mol absorbed B) -993 kJ/mol released C) +80 kJ/mol absorbed D) -80 kj/mol released N + H-H + H-H → N H3 + N H3


A) +899 kJ/mol absorbed
B) -993 kJ/mol released
C) +80 kJ/mol absorbed
D) -80 kj/mol released

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