a. Use bond energy values to estimate AH for the following reaction. AH = AH = CEN (891 kJ/mol) C-N (305 kJ/mol) (432 kJ/mol) (413 kJ/mol) (391 kJ/mol) H-H C-H N - H b. Use bond energy values to estimate AH for the following reaction. N-N H-C=N (g) + 2 H₂(g): H-F N - H F -F H (160. kJ/mol) (565 kJ/mol) (391 kJ/mol) N N (941 kJ/mol) (154 kJ/mol) kJ H H kJ H C H H -N(g) H H (g) +2F2(g) →→→→N=N(g) + 4HF(g H
Formal Charges
Formal charges have an important role in organic chemistry since this concept helps us to know whether an atom in a molecule is neutral/bears a positive or negative charge. Even if some molecules are neutral, the atoms within that molecule need not be neutral atoms.
Polarity Of Water
In simple chemical terms, polarity refers to the separation of charges in a chemical species leading into formation of two polar ends which are positively charged end and negatively charged end. Polarity in any molecule occurs due to the differences in the electronegativities of the bonded atoms. Water, as we all know has two hydrogen atoms bonded to an oxygen atom. As oxygen is more electronegative than hydrogen thus, there exists polarity in the bonds which is why water is known as a polar solvent.
Valence Bond Theory Vbt
Valence bond theory (VBT) in simple terms explains how individual atomic orbitals with an unpaired electron each, come close to each other and overlap to form a molecular orbital giving a covalent bond. It gives a quantum mechanical approach to the formation of covalent bonds with the help of wavefunctions using attractive and repulsive energies when two atoms are brought from infinity to their internuclear distance.
![Which of the following statements is(are) true?
(Simplify your answer completely.)
a. The molecules
SeS3,
SeS2,
PC15,
TeCl4,
ICl3, and
XeCl2 all exhibit at least one bond angle, which is
approximately 120°.
Ob. The bond angle in
SO₂ should be similar to the bond angle in
CS₂ or
SC1₂.
Oc. Of the compounds
CF41
KrF4, and
SeF4, only
SeF4 exhibits an overall dipole moment (is polar).
Od. Central atoms in a molecule adopt a geometry of
the bonded atoms and lone pairs about the central
atom in order to maximize electron repulsions.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4295bf62-da14-49f1-b3bf-6e678bc68de3%2F8ac0be02-4be1-423d-8f81-6200316c5b34%2Fw9xk0t8_processed.jpeg&w=3840&q=75)
![a. Use bond energy values to estimate AH for the
following reaction.
CEN
ΔΗ =
C - N
H - H
C-H
N - H
ΔΗ =
b. Use bond energy values to estimate AH for the
following reaction.
H-F
N - H
H-C=N (g) + 2 H₂(g):
NEN
(891 kJ/mol)
(305 kJ/mol)
(432 kJ/mol)
(413 kJ/mol)
(391 kJ/mol)
N - N (160. kJ/mol)
(565 kJ/mol)
(391 kJ/mol)
(941 kJ/mol)
(154 kJ/mol)
F-F
kJ
H-
kJ
H
C-
H
H
-N(g)
H
H
(g) +2F2(g) → N=N(g) + 4HF(g)
H](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4295bf62-da14-49f1-b3bf-6e678bc68de3%2F8ac0be02-4be1-423d-8f81-6200316c5b34%2Fzjcz12o_processed.jpeg&w=3840&q=75)
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