if we burns magnesium in presence of oxygen we get magnesiumoxide is it endothermic or exothermic? how can we identify that the reaction is endothermic or exothermic without using thermometer?

Asked by arifansari | 21st Aug, 2015, 05:00: PM

Expert Answer:

When magnesium is burnt in the presence of oxygen, it produces magnesium oxide along with light and heat.
Hencve, it is an exothermic process.
We can conclude that it is an exothermic process by taking account of following point.
The product formed that is magnesium oxide is very stable when it is lower in energy than the reactant.
It is a combustion reaction which is always an exothermic reaction.

Answered by Prachi Sawant | 23rd Aug, 2015, 04:10: PM