Chemical formula and heat In my Physical Science class, we are learning about chemical formulas and how to balance them. I balanced this equation: 

$$
\ce{Fe2O3 + Al -&gt; Fe + Al2O3}
$$

One of the other students asked me if this chemical formula releases or absorbs heat.

Could anyone help me give a great explanation for this question?
The best way to solve this problem is to look at the $\Delta H$ charts found online. Using the simple equation below will give you the answer.


  $$\sum \Delta H_{\text{Products}} - \sum \Delta H_\text{Reactants} = \Delta H_{\text{Reaction}}$$
  If the $\Delta H$ is positive in sign then the reaction is endothermic and if it is negative in sign then it is exothermic.