Homework Help: Heat of Formation

Posted by Kyle on Friday, November 6, 2009 at 2:13pm.

When 10.00 g of iron is burned in O2(g)to form Fe3O4 (s) , enough heat is generated to raise the temperature of 784 g of water from 18.0 C to 38.0 C.

Calculate the heat of formation of Fe3O4 (s) under these conditions in kJ/mol.

Heat of Formation - bobpursley, Friday, November 6, 2009 at 2:32pm
Assume you have one mole of FeO.Fe2O3

Find the mol mass of that.

Then find how many moles you have in 10g

heatformation= masswater*specificheat*20C/molesFeO.Fe2O3
Heat of Formation - Kyle, Friday, November 6, 2009 at 2:52pm
I got 1518 kJ/mol using that equation, but I still got it wrong. Did I do something wrong?
Heat of Formation - bobpursley, Friday, November 6, 2009 at 2:54pm
Let me see your data.
molesIronoxide= ...
specific heat constant....
Heat of Formation - Kyle, Friday, November 6, 2009 at 8:46pm
0.04319 moles F3O4

Specific Heat Constant: 4.18 J/mol*C

Answer this Question

Related Questions

Chemistry - Hydrogen is burned in oxygen to release heat. How many grams of ...
physics - A 920 g empty iron kettle is put on a stove. How much heat in joules ...
Chemistry - (A). A reaction with a known q is performed in a bomb calorimeter ...
Chemistry - One mole of carbon (12.0 g) in the form of crystalline graphite is ...
Lauren - The amount of heat required to raise temperature of 55.85 g of iron 1 ...
Chemistry - One mole of carbon (12.0 g) in the form of crystalline graphite is ...
Physics - How much heat is required to raise by 10.30°C the temperature of ...
Chemistry - A 5.00-g sample of aluminum pellets (specific heat capacity = 0.89 J...
Chemistry - I want to know the enthalpy change for this reaction which occurs in...
Chemistry - The specfic heat of iron is 0.11cal/g C. The heat of fusion of iron...

For Further Reading

First Name:
School Subject:
Answer: