If you double the surface area, what happens to the heat transfer rate?

Doubling the surface area leads to an increase in the heat transfer rate due to the enhanced area available for heat exchange. According to Newton's Law of Cooling and principles of heat transfer, the rate of heat transfer is directly proportional to the surface area through which the heat is being conducted, convected, or radiated.

When the surface area is doubled, there are more molecules or particles available to either absorb or release heat energy, resulting in an increase in the overall heat transfer rate. This relationship holds true in many common heat transfer scenarios, whether involving conduction, convection, or radiation.

Thus, when the surface area is enlarged, the capacity for transferring heat also increases proportionally, leading to a doubling of the heat transfer rate.