The reaction of Fe3O4(s) with hydrogen(g) to form iron(s) and water(g) proceeds as follows: Fe3O4(s) + 4 H2(g) 3 Fe(s) + 4 H2O(g) When 61.8 grams of Fe3O4(s) react with sufficient H2(g) , 40.3 kJ of energy are absorbed . What is the value of H for the chemical equation given?

 151 kJ

Explanation:

To calculate the moles :

It is given that:

0.267 moles of absorb energy = 40.3 kJ

Thus 1 mole of absorb energy =  

Thus the value of for the chemical equation given is 151 kJ

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.