What happens to two substances with different temperatures come into contact
When two substances with different temperatures come into contact, heat transfer occurs from the substance with a higher temperature to the substance with a lower temperature. This heat transfer can happen through various mechanisms:
1. Conduction: In solids, heat is transferred through direct contact between the particles. The higher temperature substance will transfer heat to the lower temperature substance through particle collisions.
2. Convection: In fluids (liquids or gases), heat is transferred through the movement of the molecules. The higher temperature substance will cause the molecules to move faster, which in turn transfers heat to the lower temperature substance.
3. Radiation: Heat can also be transferred by electromagnetic waves, known as thermal radiation. This transfer occurs without the need for direct contact between the substances.
The heat transfer continues until the temperatures of the two substances equalize, reaching thermal equilibrium. At that point, they will have the same temperature, and no further heat transfer occurs between them.