| 单词 | phase rule |
| 释义 | phase rulenoun Physical Chemistry.a law that the number of degrees of freedom in a system in equilibrium is equal to two plus the number of components less the number of phases. Thus, a system of ice, melted ice, and water vapor, being one component and three phases, has no degrees of freedom.Compare variance (def. 4). Origin of phase ruleFirst recorded in 1895–1900 Words nearby phase rulephase-in, phase inverter, phase microscope, phase modulation, phaseout, phase rule, phase shift keying, phases of matter, phase space, phase speed, phase-switching Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for phase rulephase rule nounthe principle that in any system in equilibrium the number of degrees of freedom is equal to the number of components less the number of phases plus twoSee also degree of freedom, component (def. 4) Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for phase rulephase rule A rule used in thermodynamics stating that the number of degrees of freedom in a physical system at equilibrium is equal to the number of chemical components in the system minus the number of phases plus the constant 2. Also called Gibbs phase rule See also phase transition state of matter. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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