Question

DO THIS Q?? pls....!!!​

Answer 1

first let us analyse the reaction(relation between,CO2,H2O and C4H10)

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2C4H10+13O2=>8CO2+10H2O

Clearly we can say,2moles of C4H10 and 13 moles of O2,, completely react with each other to form 8moles of CO2 and 10moles of H2O

now,,first caculate the total bond energy in reactant

bond energy in 2C4H10=-2878×2=-5756

bond energy in 8CO2=-3148

bond energy in 10H2O=-2858

adding the product= -6006

heat of formation=-6006-(-5756)=-125

{hope it helps}

Answer 2

Explanation:

Balance all the equation carefully, then think how to multiply the coefficient of each term to get our required equation.

Hope attached file help to solve you question..

Thanks

_________

Amrit