Question

If 17.3g of powdered aluminium are allowed to react with axcess Fe2O3 Fe2O3 how much heat is produced by this reaction

Answer 1

2Al(s) + Fe2O3(s) --> 2Fe (s) + Al2O3 (s). First, you need to look up on the web to find delta H for this reaction. If you can't find it, you can calculate it from the following:
dHo formation of reaction = (n*dHo formation of products) - (n*dHo formation of reactants)
You can find dHo formation values in tables from your text or on the web. I will call dHo formation of reaction = B
Then B x (17.3 g/2*atomic mass Al in g) = your answer.
Post your work if you get stuck.

Answer 2

-273kJ/gC°