Which of the following processes is exothermic?
A) the ionization of a melting snow atom
B) the breaking of a boiling of water bond
C) the boiling of water
D) the condensation of water
E) All of the above processes are exothermic.

Question

Quizplus · Accepted Answer

The condensation of water is an exothermic process because it releases heat as water changes from a gas to a liquid. A is incorrect because the ionization of a melting snow atom is an endothermic process, as it requires energy to remove an electron from the atom. B is incorrect because the breaking of a boiling water bond is also an endothermic process, as it requires energy to break the bond. C is incorrect because the boiling of water is also an endothermic process, as it requires energy to change water from a liquid to a gas. Therefore, only D is an exothermic process.

Which of the Following Processes Is Exothermic