N2(g) + 2H2(g) --> N2H4(g) Bond Energies, kJ/mol N--N 159 N=N 201 NN 941 H--H 43
ID: 684885 • Letter: N
Question
N2(g) + 2H2(g) --> N2H4(g)Bond Energies, kJ/mol
N--N 159
N=N 201
NN 941
H--H 436
H--N 389
The answer is 98 kJ/mol. Idon't understand how they got this. Here is mysolution.
N2(g) + 2H2(g) --> N2H4
NN --> N=N --> N--N
941kJ/mol to 201 kJ/mol to 159kJ/mol
H--H 436 kJ/mol * 2
{(941 + 201) + 2*(436)}- {4*389} = 458 kJ/mol
941 for breakage of triply bonded Nitrogen (Endothermic)
201 for breakage of doubly bonded Nitrogen (Endothermic)
436 for breakage of Hydrogen bonds * 2 since there are two moles ofhydrogen (Endothermic)
389 for formation of Hyrdogen and Nitrogen bonds * 4 since thereare four hydrogen formations (Exothermic)
*The answer is incorrect* Please describe to me what I may bedoing wrong here?
Bond Energies, kJ/mol
N--N 159
N=N 201
NN 941
H--H 436
H--N 389
The answer is 98 kJ/mol. Idon't understand how they got this. Here is mysolution.
N2(g) + 2H2(g) --> N2H4
NN --> N=N --> N--N
941kJ/mol to 201 kJ/mol to 159kJ/mol
H--H 436 kJ/mol * 2
{(941 + 201) + 2*(436)}- {4*389} = 458 kJ/mol
941 for breakage of triply bonded Nitrogen (Endothermic)
201 for breakage of doubly bonded Nitrogen (Endothermic)
436 for breakage of Hydrogen bonds * 2 since there are two moles ofhydrogen (Endothermic)
389 for formation of Hyrdogen and Nitrogen bonds * 4 since thereare four hydrogen formations (Exothermic)
*The answer is incorrect* Please describe to me what I may bedoing wrong here?
The answer is 98 kJ/mol. Idon't understand how they got this. Here is mysolution.
N2(g) + 2H2(g) --> N2H4
NN --> N=N --> N--N
941kJ/mol to 201 kJ/mol to 159kJ/mol
H--H 436 kJ/mol * 2
{(941 + 201) + 2*(436)}- {4*389} = 458 kJ/mol
941 for breakage of triply bonded Nitrogen (Endothermic)
201 for breakage of doubly bonded Nitrogen (Endothermic)
436 for breakage of Hydrogen bonds * 2 since there are two moles ofhydrogen (Endothermic)
389 for formation of Hyrdogen and Nitrogen bonds * 4 since thereare four hydrogen formations (Exothermic)
*The answer is incorrect* Please describe to me what I may bedoing wrong here?
Explanation / Answer
Your answer is incorrect. The correct answer is 98kJ.
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