Which pair of the following metals are the best and the poorest conductors of heat respectively?
A. Silver (Ag) and Lead (Pb)
B. Copper (Cu) and Tin (Sn)
C. Gold (Au) and Tin (Sn)
D. Gold (Au) and Lead (Pb)
Among the given options Silver (Ag) is the most conductive to heat and Lead (Pb) is the least conductive.
Heat transfer depends on the thermal conductivity of the metal. Thermal conductivity measures a materials ability to allow heat to pass through it via conductance.
For general scientific use, thermal conductance is the quantity of heat that passes in unit time through a plate of particular area and thickness when its opposite faces differ in temperature by one kelvin.
This means that if you heat one end of a piece of metal, the more conductive it would be the more quickly the other end of the metal will reach the same temperature.
Following is the list of Thermal Conductivity of different metals given in the options:
- Silver – 419 W/(mK)
- Copper – 401 W/(mK)
- Gold – 317 W/(mK)
- Tin – 62.1 W/(mK)
- Lead – 34.8 W/(mK)
Whereas W/(mK) = Watts per meter-kelvin