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Collected Works of H. S. Tsien (1938-1956) by Tsien H S

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Thermodynamic Properties of Gas at High Temperatures and Pressures

H.S. Tsienimage

(Daniel and Florence Guggenheim Jel Propulsion Center, California Institute of Technology, Pasadena, Calif.)

When the density of gas is high, it is well known that the simple equation of states for a perfect gas can no longer be expected to be valid. The most crude approximation to the equation of states for a dense gas is that of Van der Waal. If P is the pressure, υ the volume per molecule, T the temperature, and k the Boltzmann constant, then the Van der Waal equation is

(1)

where a and b are two constants, small in magnitude. The constant b is usually simply identified ...

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