Final answer:
Heat energy will flow from an area of higher temperature to an area of lower temperature until both areas reach the same temperature.
Step-by-step explanation:
As heat energy flows through a substance, it will flow from an area of higher temperature toward an area of lower temperature. This is because heat is the transfer of thermal energy between two bodies at different temperatures, and this process increases the thermal energy of the cooler body while decreasing the thermal energy of the warmer one. When two objects or substances with different temperatures are brought into contact, the atoms and molecules of the higher temperature substance have a higher average kinetic energy (KE) than those of the lower temperature substance. As a result, thermal energy flows spontaneously from the substance with higher temperature to the one with lower temperature. This flow continues until both substances reach thermal equilibrium, meaning they attain the same temperature.