Question

0. Heat of combustion of acetylene, carbon(s) and
H.(g) are -310, –94, -68 kcal/mole respectively.
Bond energy of C-H bond = 99 kcal
Heat of atomisation of C = 171 kcal
• Heat of atomisation of H = 52 kcal
Bond energy of C*triplebond*C bond is Q kcal/
mol. Then Q
(1) 142
(3) 194
(2) -58
(4) 310​

Answer 1

310

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