Question

You put a thermometer into a solution where a reaction is occurring. The thermometer shows that the temperature is rising.Is the reaction endothermic or exothermic?Where is the heat coming from?Where is the heat going?

Answer 1

It is exothermic

Step-by-step explanation:

The temperature rise shows that the reaction liberates it, so it is endothermic.

At end of exothermic reactions, a slight loss of mass ( mass defect )is noticed. This tells that this lost mass was converted to the heat energy since mass and energy are inter convertible.

The heat goes into the surrounding, thereby increasing the net entropy of the universe.