Thermodynamics?

Question

When we place objects of different temperatures in a room, they usually come to the same temperature. Explain the role that the Second Law of Thermodynamics plays in this.

Answer 1

There are several interpretations or descriptions of the 2nd Law. The one I like best is that the internal energy of a system (i.e. the energy of molecular vibration) represented by the Temperaure, will when left to itself DISPERSE.

So if two object are at different temperatures, internal energy is concentrated in one more than the other. The 2nd law says that Entropy will increase  i.e. the energy will DISPERSE so that the temperatures become the same.