The thermal conductivity of helium at 400 K is 0.176 W m-! K-1. Knowing only (3) this datum, estimate the thermal conductivity of helium at 800 K. Compare your estimate to the value obtained from the figure below. 0.6 He 05 0.4 CH 02 0.1 CO, CO. N, Air HCI 0.0 200 400 600 S00 Temperature, K 1000 1200 1400 1600 What do you conclude about the equation that you used for your estimate?

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