Convection is the transfer of thermal energy due to the motion of the substance
that contains the thermal energy. Although the conduction process can occur in liquids
and gases as well as solids, convection may have a much larger effect in liquids and
gases where the molecules are free to migrate.
55
Table 4.1 Thermal Conductivity of Common Materials
Metals
Thermal
Conductivity
(J/s m o
C)
Nonmetals
Thermal
Conductivity
(J/s m o
C)
Silver 420 Brick 0.84
Copper 380 Glass 0.84
Aluminum 237 Water 0.56
Brass 120 Cork 0.042
Iron 80 Wood 0.04
Nickel