Helium will not solidify as the temperature approaches absolute zero, therefore making helium an ideal liquid for low temperature physics. In this state it has no measurable viscosity and so does some odd things, such as climbing up the walls of a dish, leaking through apparently solid materials and staying motionless while its container is spun. If the temperature of liquid helium is cooled below the critical value of T λ = 2.1768 K (at saturated vapour pressure), the liquid becomes a quantum fluid called helium II. The second lightest element, helium is a colorless, odorless, and tasteless gas that becomes liquid at -268.9 degrees Celsius. Pressure-internal ene1'gy diagram Jar helium, a to 100 psia. The boiling and freezing points of helium are lower than those of any other known substance. At -269°C, helium gas condenses to become a liquid. Cool it even further and it becomes a state of matter called a superfluid. Nm3 (normal cubic meter) gas measured at 1 atmosphere and 0°C . generically refer to it as helium. Liquid helium is a colorless, nontoxic liquid with a density of one-eighth that of water, inert under all temperature and pressure conditions. The Dewar used in these experiments had a fill tube with a temperature gradient from 4° to 76° K. One might erroneously speculate that if a con tainer is filled wi th liquid hrjium to a greater level than that corresponding to the critical density, the liquid Without the presence of liquid helium, MRI machines would overheat and stop working. Liquid helium exists at very low temperatures - (453°F, -269°C) at atmospheric pressures, a temperature that is only a few degrees above absolute zero. Liquid measured at 1 atmosphere and boiling temperature . At atmospheric pressure it has a temperature of approximately -452°F (132 degrees colder than the freezing point of liquid nitrogen). All values rounded to nearest 4/5 significant numbers . Liquid helium has the lowest known temperature when it is in its liquid state, making it efficient and preferred cooling agent. Liquid helium then transfers heat away from superconductors. The most notable example is that of CERN’s Large Hadron Collider, which uses 96 metric tons of liquid helium to maintain the temperature at 1.9K. In addition to this, the military utilizes liquid helium … The most important property of helium II is superfluidity: mass flow without viscous friction. During the first stage, some 10,000 tonnes of liquid nitrogen are used in heat exchangers in the refrigerating equipment to bring the temperature of the helium down to 80 K. The helium is then cooled to 4.5 K (-268.7°C) using turbines. Beyond that, there’s significant benefit to be derived from using liquid helium for cryogenic treatment of metals. 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