The following question asks me: Calculate the Enthalpy of Reaction for ( using Hess's Law ):
Using the following data ( Enthalpy of Combustion ): Glucose=-2820 Ethanol -1367 The answer is:
The answer then states that there is a linear method available for obtaining the same answer:
Which is : -2820 - ( 2 x -1367 ) = - 86 KJ mol
My confusion is: if the question is asking for the Enthalpy of Reaction ( Delta H ) - assuming its for the whole reaction
, then why is the other product CO2
not included in the calculation ? ( why is only 2C2
OH included in the calculation ? ).