Question

why does reaction mixture become warm in exothermic reaction??
I can't understand it because heat is released in exothermic reaction then why does the mixture become warm??

Answer 1

we know that heat is released in exothermic reaction.
thus the heat which is coming out of that reaction ,it comes out by reacting with that reaction.thus reaction became heat.

Answer 2

So much heat is released that the solution may boil very violently, splashing concentrated acid out of the container and all this because the reaction is exothermic.