Matching Words
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Phase Rule
- - A generalization with regard to systems of chemical equilibrium, discovered by Prof. J. Willard Gibbs. It may be stated thus: The degree of variableness (number of degrees of freedom) of a system is equal to the number of components minus the number of phases, plus two. Thus, if the components be salt and water, and the phases salt, ice, saturated solution, and vapor, the system is invariant, that is, there is only one set of conditions under which these four phases can exist in equilibrium. If only three phases be considered, the system is univariant, that is, the fixing of one condition, as temperature, determines the others.
Phasemeter
- - A device for measuring the difference in phase of two alternating currents of electromotive forces.
Phasianids
- noun - a kind of game bird in the family Phasianidae
Phosgenite
- - A rare mineral occurring in tetragonal crystals of a white, yellow, or grayish color and adamantine luster. It is a chlorocarbonate of lead.
Phosphates
- noun - a salt of phosphoric acid
- carbonated drink with fruit syrup and a little phosphoric acid
Phosphatic
- - Pertaining to, or containing, phosphorus, phosphoric acid, or phosphates; as, phosphatic nodules.
Phosphines
- noun - a colorless gas with a strong fishy smell; used as a pesticide
Phosphinic
- - Pertaining to, or designating, certain acids analogous to the phosphonic acids, but containing two hydrocarbon radicals, and derived from the secondary phosphines by oxidation.
Phosphonic
- - Pertaining to, or designating, certain derivatives of phosphorous acid containing a hydrocarbon radical with the phosphorus directly bonded to a carbon, and analogous to the sulphonic acids; as, methanephosphonic acid, CH3.PO.(OH)2.
Phosphoric
- adjective - containing or characteristic of phosphorus; "phosphoric acid"