Magnesium oxide does not readily decompose into magnesium and oxygen. The reaction is shown below. MgO(s) + 601.7 kJ mc017-1.jpg
Mg(s) + ½O2(g) Which factor plays the most important role in allowing this reaction to occur? temperature concentration pressure surface area Mark this and return
Balanced chemical reaction: MgO(s) + heat → Mg(s) + 1/2O₂(g).
This is endothermic reaction (ΔH > 0, chemical reaction that absorbs more energy than it releases). In endothermic reactions heat is reactant.
Because magnesium oxide (MgO) is in solid state, concentration, pressure and surfuce does not play the most important role in allowing this reaction to occur.
