The energy of a reaction can be determined by (energy of bonds broken) - (energy of bonds formed). Use the table below to calculate the energy absorbed or released by: 2 NH3 ? N2 + 3 H2 Bond Energy (kJ/mol) N-H 393 N?N 941 H-H 436
Added by John M.
Close
Step 1
The reaction is given as: 2 NH₃ → N₂ + 3 H₂ The bond energies are given as: NH: 391 kJ/mol N≡N: 941 kJ/mol H-H: 456 kJ/mol For the bonds broken, we have 2 moles of NH₃, and each NH₃ molecule has 3 NH bonds. So, the total energy of the bonds broken is: Energy Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 63 other Chemistry 101 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Given the thermochemical equation: N2(g) + 3 H2(g) → 2 NH3(g) ΔH = -91.8 kJ How much energy is given off when 262 g of N2 reacts?
Susan H.
The energy change ∆H associated with the reaction NBr3(g) + 3 H2O(g) → 3 HOBr(g) + NH3(g) is +81 kJ. NBr3 is arranged with all of the bromines attached to the nitrogen and HOBr is arranged as H-O-Br. The O-H bond is 459 kJ. The N-H bond is 386 kJ. The O-Br bond is 201 kJ. The strength of the N-Br bond is
David C.
Use bond energies as found in Table 9.1 of Tro, Fridgen, and Shaw and estimate the energy change ΔH° (in kJ/mol) for the following reaction: H—C ≡ N + 2 H₂ → CH₃—NH₂
Recommended Textbooks
Chemistry: Structure and Properties
Chemistry The Central Science
Chemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD