This is a question I have for my lab report "Determining the Enthalpy of a Chemical Reaction". I feel like the answer is probably right in front of my face, I just don't know how to start.

 

The first data analysis problem was to find q of each reaction, which I was able to do.

 

Then it instructs me to "calculate the enthalpy change, ΔH, for each reaction in terms of kJ/mol of each reactant".

 

I understand what enthalpy is, for the most part, but I don't really know what to do. You find the enthalpy change for a reaction as the enthalpy of the products - the enthalpy of the reactants, right? But I don't know how to calculate the enthalpy change for each reactant, is that a given value? I know that there are given thermodynamic values available for me to calculate that; is that all I do? I know the names of the products and reactants for each reaction, so do I need to do ΔHreaction = ΣΔHf (Products) - ΣΔHf (Reactants), or is there something I need to do involving the heat energy (q) of the reactions?

 

This is for AP Chemistry, a high school course. Please help if you can, thank you.

All you have to do is look up the enthalpies of the products and the reactants and subtract. It's as easy as it looks.

 

I took AP Chem a year ago, so of course I might have forgotten some key detail, but I believe this is correct...

Wow yeah I figured that's what I was supposed to do. Thanks so much!

dont forget that you have to multiply each product and each reactant by its stoichiometric coefficient