Question

Calculate the bond energy of Cl−Cl bond from the following data:
CH4(g)+Cl2(g)→CH3Cl(g)+HCl(g);ΔH=−100.3kJ. Also the bond energies of C−H,C−Cl,H−Cl bonds are 413, 326 and 431 kJ/mol respectively.

Answer 1

^h=nhproducts-mhseatants

-109.3=(3*413+326+431)-(4*413+x)

-109.3=344-x

X=453.3kj mol^-1