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standard enthalpy change of combustion, bond enthalpies please help

Hey guys, i have been told to work out the standard enthalpy change of combustion using the following bond enthalpies:
C-H +413
C-C +347
O=O +497
C=O +805
O-H +463 And

the equation: 2C8H18=25O2=16CO2+18H2O
thankyou :smile:
Reply 1
Avatar for Neuth
Neuth
19
Original post by jadder1224

thankyou :smile:


What are you struggling with?
Original post by jadder1224
Hey guys, i have been told to work out the standard enthalpy change of combustion using the following bond enthalpies:
C-H +413
C-C +347
O=O +497
C=O +805
O-H +463 And

the equation: 2C8H18=25O2=16CO2+18H2O
thankyou :smile:


Remember that enthalpy change is (sum of bond enthalpies in prouducts)-(sum of bond enthalpies of reactants)
Sometimes it helps to draw out the molecules so you can see how many of each bond you have.
Reply 3
Avatar for jadder1224
jadder1224
OP
15
Original post by Neuth
What are you struggling with?

Hi i was wondering what rhe answer is i got 10,277

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