Calculate the enthalpy change during the reaction.
H2(g) + Br2(g) → 2HBr(g).
Given eH-H = 435 kJ mol-1; egr-Br= 192 kJ mol-1 and eH-Br = 368 kJ mol-1.
H2 + Br2→ 2HBr
ΛH= Bond energy data for formation of bond + bond energy data for dissociation of bond
