Some bond energies are listed below
C-H bond 410kJ/mol
C-Cl bond. 340
Cl-Cl bond. 244
Br-Br bond. 193
These bond energies relate to the following
P. Br2 -. 2Br
Q. 2Cl -. Cl2
R. Ch3 + Cl -. CH3Cl
S. CH4 -. CH3 + H
What is the order of enthalpy changes of these reactions from negative to most positive?

Question

Some bond energies are listed below
C-H bond        410kJ/mol
C-Cl bond.       340 
Cl-Cl bond.       244 
Br-Br bond.       193 
These bond energies relate to the following 
P.    Br2 ->. 2Br 
Q.    2Cl ->.  Cl2 
R.     Ch3 + Cl ->. CH3Cl 
S.      CH4 ->.   CH3 + H 
What is the order of enthalpy changes of these reactions from negative to most positive?

chmvijay · Answer

Br2--->2Br  what will be the energy can you tell

chmvijay · Answer

here energy is required or liberated can you tell

anonymous · Answer

Oh I just checked it 
Now that exams are over so is this :p