Two solid blocks are HEATED to the temperatures show. The blocks are placed so they touch. Which diagram shows the DIRECTION HEAT WILL FLOW?

Heat flows from the block at high temperature to the one with lower temperature

Explanation:

The direction of heat flow is from a body at higher temperature to one with a lower temperature.

Temperature gradient determines the way and manner in which heat is dissipated. As a system tend to increase entropy, it ensures that heat moves from hotter body to a colder body. Heat movement here is by conduction as the body touches. When both bodies reaches the same temperature, thermal equilibrium is established.

Copper, silver, aluminum, cobalt, chromium, mercury