Multiple Choice
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
Correct Answer:
Verified
Q14: According to the following balanced chemical equation,if
Q24: What is a chemical equation?<br>A)It is a
Q68: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6597/.jpg" alt=" -Given that the
Q105: What is an exothermic reaction?<br>A)It is a
Q110: Steel wool wetted with vinegar is sealed
Q118: Why does iodine, <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2711/.jpg" alt="Why does
Q121: The following diagram depicts the reaction between
Q123: Since some of the compounds that are
Q124: Balance these equations. _ <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB2711/.jpg" alt="Balance
Q125: What is wrong with the following depiction