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a) What is the standard enthalpy of combustion of propene? Note that since this is the standard enthalpy, carbon dioxide will be gaseous and water will be a liquid.

b) What is the value of Delta E for the combustion of propene?

for part a i tried the hess law but i dont know how to set it up so i tried the equation form of that but i dont know what deltaH belongs where and part b i just dont know how to do. Help plz

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