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Liquid helium is a physical state of helium at very low temperatures at standard atmospheric pressures. Liquid helium may show superfluidity . At standard pressure, the chemical element helium exists in a liquid form only at the extremely low temperature of −269 °C (−452.20 °F; 4.15 K).
The table of specific heat capacities gives the volumetric heat capacity as well as the specific heat capacity of ... liquid: 4.700: 80.08: ... Helium: gas: 5.1932 ...
J.A. Dean (ed), Lange's Handbook of Chemistry (15th Edition), McGraw-Hill, 1999; Section 6, Thermodynamic Properties; Table 6.3, Enthalpies and Gibbs Energies of Formation, Entropies, and Heat Capacities of the Elements and Inorganic Compounds
The plot of the specific heat capacity versus temperature. The lambda point is the temperature at which normal fluid helium (helium I) makes the transition to superfluid state . At pressure of 1 atmosphere, the transition occurs at approximately 2.17 K.
This is a table of specific heat capacities by magnitude. ... Ammonia (liquid) 5193 Helium: 10 4: 14304 Hydrogen This page was last edited on 21 May 2024, at 01 ...
At any point, an MRI machine contains about 2,000 liters of liquid helium, though suppliers need to replenish any helium that boils off. Mahesh estimates that an MRI machine uses 10,000 liters of ...
J.A. Dean (ed.), Lange's Handbook of Chemistry (15th Edition), McGraw-Hill, 1999; Section 6, Thermodynamic Properties; Table 6.4, Heats of Fusion, Vaporization, and Sublimation and Specific Heat at Various Temperatures of the Elements and Inorganic Compounds
This results in motion even at absolute zero. For example, liquid helium does not freeze under atmospheric pressure regardless of temperature due to its zero-point energy. Given the equivalence of mass and energy expressed by Albert Einstein's E = mc 2, any point in space that contains energy can be thought of as having mass to create particles.