Question 2.169: (a) Assuming moderately dilute helium gas so that binary col...
(a) Assuming moderately dilute helium gas so that binary collisions of helium atoms determine the transport coefficients, derive an expression for the thermal conductivity of the gas.
(b) Estimate the ratio of the thermal conductivity of gaseous { }^{3} He to that of gaseous { }^{4} He at room temperature.
(c) Will this ratio become different at a temperature near 2 K? Why?
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