Question

In an experiment, Ann mixes concentrated sulfuric acid with water in a reaction test tube. The walls of the test tube turn hot. What type of reaction has occurred?

Answer 1

exothermic as energy is being released by the reaction

Answer 2

An exothermic reaction

Step-by-step explanation:

When An mixes sulfuric acid with water, they react and releases heat: it is an exothermic reaction. The released heat turn hot the walls of the tube.

It is very dangerous to add water to a concentrated acid like sulphuric acid. For that reason chemists often say: "Always add the acid". If you have to mixture water with an acid, you have to add the acid to the water and not in the opposite order, because the reaction releases a lot of heat and can produce splashings of acid.