phase rule

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phase rule

n. Physics

A rule stating that the number of degrees of freedom in a material system at equilibrium is equal to the number of components minus the number of phases plus the constant 2. For example, the system of water vapor, liquid water, and solid ice has zero degrees of freedom because the three phases of vapor, liquid, and solid coexist in the one component, water.

phase rule

(Chemistry) the 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 two See also degree of freedom, component [4]

phase 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

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at variance component degree of freedom Gibbs phase rule system variance			From a thermodynamic perspective, consider Gibb's phase rule (10) which tells us, for equilibrium conditions, the number of degrees of freedom, f, available to a system of c components when there are p coexisting phases present. Exploring robust interactions between human intention and inanimate / ... by Tiller, William A.; Dibble, Walter E.; Kohane, Michael J. / Frontier Perspectives The dotted lines in (20, [ILLUSTRATION FOR FIGURES 7 AND 8 OMITTED]) are required to satisfy the Gibbs phase rule. Thermodynamics of polymer solutions and blends by Hoch, Michael / Polymer Engineering and Science As required by Section 104 of the SAFE Port Act, the card reader pilot test will help inform the requirements of the pending TWIC second phase rule related to TWIC readers and local TWIC access control requirements. Passenger Vessel Association and Watermark Cruises Select CoreStreet ... by Business Wire			Phascolome phase Phase angle phase change phase contrast microscope Phase converter Phase displacement phase I phase I clinical trial phase II phase II clinical trial phase III phase III clinical trial phase in phase inverter phase IV phase IV clinical trial phase line Phase meter phase microscope phase modulation phase of cell division phase of the moon Phase of vibration phase out phase rule phase shift keying phase space phase speed Phase splitter Phase splitting phase transition phase-contrast microscope phase-in phase-out phase-switching phased phased array phasedown Phasel Phaseless Phaseolus Phaseolus aconitifolius Phaseolus acutifolius latifolius Phaseolus angularis Phaseolus aureus Phaseolus caracalla Phaseolus coccineus Phaseolus limensis Phaseolus lunatus Phaseolus multiflorus			phase out phase out phase out phase out phase out phase out phase out of Phase Partitioning Experiment Phase permeability Phase permeability phase plane analysis phase plate phase plate phase plate phase plate Phase portrait Phase problem phase quadrature Phase Quadrature Multiplexing phase ratio Phase Reference Symbol Phase Reflection Diagram Phase Resolved Optical Emission Spectroscopy phase resonance Phase response Phase response curve Phase Retrieval Holography phase reversal phase reversal modulation Phase Review Discipline phase rule phase rules phase rules Phase sensitive detector Phase sensitive detector Phase Sensitive Inversion Recovery Phase Sensitive Voltmeter Phase Separated Petroleum Hydrocarbon Phase shift Phase Shift Analysis Phase Shift Armor Phase Shift Control Electronics Phase Shift Control Unit Phase Shift Focus Monitor Phase shift keying Phase shift keying Phase shift keying Phase Shift Keying 31 Baud Phase Shift Keying Information Exchange Subsystem Phase Shift Modulation Phase Shift Modulation Phase shift oscillator Phase Shift Register Phase shifter Phase shifter Phase Shifter, Microwave Phase Shifting Interferometry Phase Shifting Mask Phase Shifting Transformer Phase Shifting Twyman-Green Interferometer phase shifts

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