Question

A student pours ammonium nitrate into a container of room temperature water. The student stirs the mixture with a stirring rod and then feels the outside of the container, which is cold to the touch. Which material is part of the system that absorbed heat? (1 point)

the air

the water

the container

the stirring rod

Answer 1

The water solution after the reaction absorbed the heat while forming the products.

• The reactions in which the heat is absorbed by the surroundings are called endothermic reactions.
• In this case, the heat is absorbed by the solution to break the internal bonds of the compounds and form products.
• The equation for the following reaction is:

$NH_{4}NO_{3}+H_{2}O$ → $HNO_{3}+NH_{4}OH$