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Which of the following material has highest thermal conductivity at room temperature

Which of the following material has highest thermal conductivity at room temperature Correct Answer Diamond

Explanation:

Thermal conductivity (k)

  • Thermal conductivity is the ability of a medium to transfer or conduct heat.
  • Greater is the value of thermal conductivity, greater is the ability of a medium to transfer heat.
  • Thermal conductivity depends on the structure of the material as well as on how closely atoms are packed in the lattice.

The general order of k is:

Non-metallic crystals > Pure metals > Alloys > Non-metallic solids > liquids > Insulators > Gases

Thermal conductivity of some material is given in the table below:

Material

Thermal conductivity (k) (W/mK)

Diamond

2300

Silver

428

Copper

401

Gold

317

Aluminium

237

Brass

109
Iron 79.5

Steel

50.2

Air

0.024


∴ Among the given options, Diamond has maximum thermal conductivity

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