[AMEDIO]

The heat of combustion of acetylene is 312 kcal . If heat of formation of CO₂ and H₂O are 94.38 and 68.38 kcal respectively , calculate C triple bond C energy . Given that heat of atomization of C and H are 150 and 51.5 kcal respectively and C-H bond energy is 93.64 kcal.

now i think i am making a calculation error here...

i have added twice the heat of C-H bond , bond energy of C triple bond C ( let it be x ) , twice the heat of formation of CO₂ and heat of formation of H₂O and also the two heat of atomizations and equated it to 312 kcal.....but not getting the right answer...where am i wrong??

[rabolisk]

Write a balanced chemical reaction first.

[AMEDIO]

i have written it....

[AMEDIO]

first one is C2H2 + 5/2 O2 - > 2 CO2 + H2O

C + O2 - > CO2

and H2 + 1/2 O2 - > H2O.

[rabolisk]

Is the answer 215.72?

[AMEDIO]

nopes.