Achemist measures the energy change ? h during the following reaction:

2fe2o3(s) ? 4feo(s) + o2(g) =? h560.kj
this reaction is.

(a) endothermic
(b) exothermic

suppose 66.6 g of fe2o3 react. will any heat be released or absorbed? |

(a) yes, absorbed
(b) yes released.
(c) no

(A) endothermic

(A) Yes, absorbed

Explanation:

Let's consider the following thermochemical equation.

2 Fe₂O₃(s) ⇒ 4 FeO(s) + O₂(g)  ΔH = 560 kJ

Since ΔH > 0, the reaction is endothermic.

We can establish the following relations:

Suppose 66.6 g of Fe₂O₃ react. The heat absorbed is:

it is the most commonly accepted one