Hydrogen bromide is formed from hydrogen gas and bromine gas according to the equation. H (g) + Br (g) 2HBr (g) Use bond energies to calculate H for the reaction. Type in the correct answer.
Step 1.
Rewrite the equation showing bonding
H -H + Br -Br   = 2(H -Br)
Step 2.
One H -H gives x 436 = kj
One bond of Br-Br gives x 193 = kj
kj/mole Total energy applied to break bonds Kj