Parpia, Jeevak M. Department of Physics, Cornell University, Ithaca, New York.
Lee, David M. Department of Physics, Cornell University, New York, New York. Nobelist.
- Additional Readings
The temperature at which an ideal gas would exert no pressure. The Kelvin scale of temperatures is defined in terms of the triple point of water, (where the solid, liquid, and vapor phases coexist) and absolute zero. Thus, the Kelvin degree is 1/273.16 of the thermodynamic temperature of the triple point. Temperature is measured most simply via the constant-volume ideal-gas thermometer, in which a small amount of gas is introduced (in order to limit the effect of interactions between molecules) and then sealed off. The gas pressureP referenced to its value at the triple point is measured, and temperature may be inferred from Eq. (1).
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