Which material will conduct heat the best among the following options?

Copper is the best conductor of heat among the listed materials due to its high thermal conductivity. Thermal conductivity is a measure of a material's ability to conduct heat; higher values indicate that heat will pass through the material more easily. Copper has a thermal conductivity of approximately 401 W/m·K, which is significantly higher than that of aluminum (about 237 W/m·K), brass (about 120 W/m·K), and glass (approximately 1 W/m·K for standard glass).

This characteristic makes copper an ideal choice for various applications requiring effective heat transfer, such as in heat exchangers and electrical wiring. Its efficiency in conducting heat results from the structure of its atomic lattice, which allows free electrons to move easily and carry thermal energy throughout the material.

In contrast, while aluminum is also a good conductor of heat, it does not reach the same levels of conductivity as copper. Brass, being an alloy of copper and zinc, has even lower thermal conductivity than both copper and aluminum. Glass, on the other hand, is a poor conductor of heat, classifying it as an insulator rather than a conductor. Thus, among the given choices, copper stands out as the superior heat conductor.