Answer:
155 kJ
Explanation:
The energy change will be the energy of the reactants less the energy of the products. And the energy of each compound is the sum of the energy of their bonds. Let's call y the N-Br strength.
3HOBR = 3x(459 + 201) = 1980 kJ
NH₃ = 3x386 = 1158 kJ
3H₂O = 3x(2x459) = 2754 kJ
NBr₃ = 3y
3y + 2754 - 1158 - 1980 = 81
3y -384 = 81
3y = 465
y = 155 kJ
Answer:
For work to be done there must be 2 conditions to be followed:
(i) Force must be applied
(ii) displacement in the direction of force.
So if there is no force or displacement there is no work done. Since there is no displacement, as there is no initial and final position, no work is done. If he moves to a different position, work is done.
2.09232813x10^-28
you have to divide 1.26x10^-4 by 6.022x10^23
