how do you find the heat of combustion etc. when you are not given any equations to start you off? You only have the heats of formation.

Siofra
Make the three equations of formation to which you are given the heats. Then write out the equation of combustion you are trying to find. Then balance the equations as normal (reverse or multiply ect) to make the forth equation. Add the new heats together and that's your answer.

SaraahShan
I'm so confused on how to do them :( Thanks for your help though!

damien3ck
This might help

Me
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