3. Thermal conductivity of a substance is measured as k = KTIT,. Find an average value for thermal conductivity in the temperature range of T, and Tz. [Ans. = (k, /272 xT2 -2(T - T) 4 -3/2

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.