Homework Help Forum: chemistry

Posted by lauren on Thursday, October 15, 2009 at 11:41pm.

I still do not understand how to figure out this problem yet? 6FeO3----->4Fe304+02 DELTA H=+ 392kj If 2.83 g of Fe2O3 decomposed according to the above reaction , how many kj of heat would be exchanged with the enviroment? chem - DrBob222, Thursday, October 15, 2009 at 11:11pm 2.83 g Fe2O3 is how many moles? 6 moles Fe2O3 uses 392 kJ, so ?? moles will use xx kJ.

• chemistry - DrBob222, Thursday, October 15, 2009 at 11:47pm

  You haven't done anything yet except retype the problem. How many moles is in 2.83 g Fe2O3? If 6 moles Fe2O3 uses 392 kJ heat, how much heat would be used by 3 moles Fe2O3? Suppose that would be half of 392? Use the same reasoning to determine heat used by moles in 2.83 g Fe2O3.

  
  

Answer this Question

First Name:
School Subject:
Answer: