You're absolutely right! The condition of balance when two substances in thermal contact reach the same temperature is called thermal equilibrium.

Here's a more detailed explanation:

* Thermal Contact: This means the two substances are able to exchange heat energy. They might be physically touching, or they could be separated by a material that allows heat transfer (like air).

* Heat Transfer: When there's a temperature difference, heat energy flows from the hotter substance to the colder substance.

* Thermal Equilibrium: This is the state where the heat transfer stops. The two substances have reached the same temperature, and there is no longer a net flow of heat between them.

Let me know if you have any other questions!