Use the equation and bond energies to answer the question. 2H₂O ⇒ 2H₂ + O2
H-O: 467 kJ/mol
H-H: 432 kJ/mol
O=O: 495 kJ mol

What is the total energy of the reaction? Is this an endothermic or exothermic reaction?

A. -509 kJ/mol, endothermic
B. 509 kJ/mol, endothermic
C. -509 kJ/mol, exothermic
D. 509 kJ/mol, exothermic

(Energy in Chemical Reaction Unit I test)