* Heat always flows from a region of higher temperature to a region of lower temperature. This is a fundamental principle of thermodynamics.
* Objects with higher temperatures have more internal energy. This internal energy is associated with the random motion of the atoms and molecules within the object.
* When the objects touch, the molecules of the hotter object collide with the molecules of the colder object. These collisions transfer energy from the hotter object to the colder object.
This process continues until both objects reach the same temperature. This final temperature is somewhere between the initial temperatures of the two objects, but closer to the temperature of the object with more thermal mass.
Here's an example:
Imagine you put a hot cup of coffee on a cold countertop. The coffee is much hotter than the countertop. Heat will flow from the hot coffee to the cold countertop until they reach the same temperature. The coffee will cool down, and the countertop will warm up.
The rate at which heat flows depends on several factors, including:
* The temperature difference between the objects (the greater the difference, the faster the heat flow).
* The thermal conductivity of the materials (materials that conduct heat well, like metals, will allow heat to flow faster).
* The surface area of contact (a larger surface area allows more heat to flow).
* The time of contact (the longer the objects are in contact, the more heat will flow).
