Question

Which of the following has the highest thermal conductivity (in cal.cm-1 s-1 K-1 unit)? (a) Copper (b) Gold (c) Iron (d) Diamond

Answer 1

Answer:

copper has highest thermal conductivity.

Answer 2

Out of the given options, Diamond has the highest thermal conductivity.

• Thermal conductivity of a material is the amount of heat which passes in unit time through unit area for a substance whose thickness is unity, when its opposite faces differ in temperature by one degree.
• The thermal conductivity of Copper is 0.99 cal.cm-1 s-1 K-1.
• The thermal conductivity of Gold is 0.74 cal.cm-1 s-1 K-1
• The thermal conductivity of Iron is 0.163 cal.cm-1 s-1 K-1
• The thermal conductivity of Diamond is 5.25 cal.cm-1 s-1 K-1
• So, out of the four given options, Thermal conductivity of Diamond has highest thermal conductivity.