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In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium. [1] It is that temperature and pressure at which the sublimation, fusion, and vaporisation curves meet. For example, the triple point of mercury occurs at a ...
The former governor of Alaska, Walter J. Hickel, proposed a water pipeline from his state to California in 1991, [2] which was quickly criticized for being too expensive, environmentally problematic, and "too far-out". [3] The Office of Technology Assessment (OTA) published a report in 1992 considering an implementation of the plan using a ...
Triple points mark conditions at which three different phases can coexist. For example, the water phase diagram has a triple point corresponding to the single temperature and pressure at which solid, liquid, and gaseous water can coexist in a stable equilibrium (273.16 K and a partial vapor pressure of 611.657 Pa).
The temperature and pressure at which ordinary solid, liquid, and gaseous water coexist in equilibrium is a triple point of water. Since 1954, this point had been used to define the base unit of temperature, the kelvin, [45] [46] but, starting in 2019, the kelvin is now defined using the Boltzmann constant, rather than the triple point of water ...
The company has said that under a decades-old agreement, a portion of the water that flows through the 4.5-mile pipeline goes to the Arrowhead Springs property, and a portion of the water is ...
It is also possible for other sets of phases to form a triple point, for example in the water system there is a triple point where ice I, ice III and liquid can coexist. If four phases of a pure substance were in equilibrium (P = 4), the phase rule would give F = −1, which is meaningless, since there cannot be −1 independent variables. This ...
In condensed matter physics, dealing with the macroscopic physical properties of matter, a tricritical point is a point in the phase diagram of a system at which three-phase coexistence terminates. [4] This definition is clearly parallel to the definition of an ordinary critical point as the point at which two-phase coexistence terminates.
Delta Conveyance Project, formerly known as California Water Fix and Eco Restore or the Bay Delta Conservation Plan, is a $15 billion [1] plan proposed by Governor Jerry Brown and the California Department of Water Resources to build a 36 foot diameter tunnel to carry fresh water from the Sacramento River southward under the Sacramento-San Joaquin Delta to Bethany Reservoir for use by the ...