Q: When a solute dissolves into a solvent what is that called?


Read this paragraph and choose the correct option from the provided answers:

Enthalpy changes also occur when a solute undergoes the physical process of dissolving into a solvent. Hot packs and cold packs (see Figure below ) use this property. Many hot packs use calcium chloride, which releases heat when it dissolves according to the equation below.

 Choices:

- solubility

- viscosity

- mixing

- enthalpy


A:
enthalpy