What condition allows heat to flow quicker between two objects?

The condition that allows heat to flow quicker between two objects is a greater temperature difference. Heat naturally flows from areas of higher temperature to areas of lower temperature, and the larger the difference in temperature between the two objects, the faster the rate of heat transfer. This principle is rooted in the second law of thermodynamics, which states that heat energy will spontaneously transfer in the direction that reduces temperature disparities within a system.

A significant temperature difference drives more energetic collisions between molecules, facilitating the transfer of thermal energy. For instance, if one object is significantly hotter than the other, heat will transfer rapidly until thermal equilibrium is achieved.

While other factors like size difference and material density can influence the rate of heat transfer, the temperature difference is the primary driving force behind the flow of heat. Greater distances between objects would actually hinder the rate of heat transfer, as it would require more energy for heat to travel across a larger space.