19. Given the standard enthalpies of formation for Br₂(g) and Br(g), 30.7 and 112 kJ/mol respectively, what is the Br-Br bond enthalpy?
(A) 81.3 kJ/mol
(B) 193.3 kJ/mol
(C) 142.7 kJ/mol
(D) 254.7 kJ/mol
(E) 112 kJ/mol

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