How Much Energy,in Kilojoules,is Released or Absorbed from the Reaction $\mathrm { N } _ { 2 }$

question 85

Multiple Choice

How much energy,in kilojoules,is released or absorbed from the reaction of one mole of nitrogen, $\mathrm { N } _ { 2 }$ ,with three moles of molecular hydrogen, $\mathrm { H } _ { 2 }$ ,to form two moles of ammonia,N $\mathrm { H } _ { 3 }$ ? 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 $\mathrm { H } _ { 3 }$ + N $\mathrm { H } _ { 3 }$

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

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A cluster of symptoms that usually occur together.

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