Homework Help: AP Chem

Posted by Beth on Sunday, November 7, 2010 at 4:31pm.

The energy change H associated with the
reaction
NBr3(g) + 3H2O(g) -> 3HOBr(g) + NH3(g)
is +81 kJ/mol rxn.
These bond energy values might be useful:
O-H 459 kJ/mol; N-H 386 kJ/mol; O-Br 201
kJ/mol.
The strength of the N Br bond is
1. 4 kJ/mol
2. 465 kJ/mol
3. 66 kJ/mol
4. 128 kJ/mol
5. 248 kJ/mol
6. 280 kJ/mol
7. 155 kJ/mol

AP Chem - DrBob222, Sunday, November 7, 2010 at 9:00pm
delta Hrxn = (sum bonds broken reactants) - (sum bonds formed products).
Solve for NBr bonds and divide by 3.
AP Chem - Sena, Thursday, October 27, 2011 at 10:37pm
7
AP Chem - Anonymous, Tuesday, November 15, 2011 at 3:54am
7
AP Chem - j, Tuesday, September 11, 2012 at 1:15am
66 kJ/mol

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