Answer:
X = 350 kJ/mol
Explanation:
According to the question:
Energy needed when breaking bonds + 1640 kJ/mol = Energy released when forming bonds
∴ 2 (C - C) + 8 (C - H) + 5 (O = O) + 1640 = 6(C = O) + 8(O - H)
⇒ 2 (X) + 8 (410) + 5 (500) + 1640 = 6 (740) + 8 (460)
⇒ 2X + 7420 = 8120
⇒ 2X = 700
⇒ X = 350 kJ/mol
