Bond energies can be obtained by using the following relation: `DeltaH (reaction) = sum`Bond energy of bonds, broken in the reactants `-sum` Bond energy fo bonds, formed in the products
Bond enegry depends on three factors:
a. Greater is the bond length, lesser is the bond enegry.
b. Bond energy increases with the bond multiplicity.
c. Bond enegry increases with electronegativity difference between the bonding atoms.
Use the bond enegries to estimate `DeltaH` for this reaction:
`H_(2)(g) +O_(2)(g) rarr H_(2)O_(2)(g)`
`{:(“Bond”,”Bond energy”),(H-H,436 kJ mol^(-1)),(O-O,142 kJ mol^(-1)),(O=O, 499kJ mol^(-1)),(H-O,460kJ mol^(-1)):}`
A. `-127 kJ`
B. `-109 kJ`
C. `-400 kJ`
D. `-800 kJ`

Bond energies can be obtained by using the following relation: `DeltaH (reaction) = sum`Bond energy of bonds, broken in the reactants `-sum` Bond energy fo bonds, formed in the products
Bond enegry depends on three factors:
a. Greater is the bond length, lesser is the bond enegry.
b. Bond energy increases with the bond multiplicity.
c. Bond enegry increases with electronegativity difference between the bonding atoms.
In `CH_(4)` molecule, which of the following statement is correct about the `C -H` bond enegry?
A. All `C-H` bonds of methane have same enegry.
B. Average of all `C -H` bond energies is considered.
C. Fourth `C -H` bond required highest enegry to break.
D. None of the above

Bond energies can be obtained by using the following relation: `DeltaH (reaction) = sum`Bond energy of bonds, broken in the reactants `-sum` Bond energy fo bonds, formed in the products
Bond enegry depends on three factors:
a. Greater is the bond length, lesser is the bond enegry.
b. Bond energy increases with the bond multiplicity.
c. Bond enegry increases with electronegativity difference between the bonding atoms.
The heat of formation of `NO` from its elements is `+90 kJ mol^(-1)`, What is the approximate bond dissociation enegry of the bond in `NO`?
`BE_(N=N) = 941 kJ mol^(-1) BE_(O=O) = 499 kJ mol^(-1)`
A. `630 kJ mol^(-1)`
B. `700 kJ mol^(-1)`
C. `860 kJ mol^(-1)`
D. `810 kJ mol^(-1)`