Girard College
Girard College in Philadelphia, an elementary and secondary boarding school for children with financial need from single-parent or parentless families. It opened 1848 with a bequest, now grown to a huge endowment, from Stephen Girard ; it was originally a school for fatherless boys.
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Study on the energy conservation performance of the plate enthalpy exchanger.(Technical report)
Magazine article from: ASHRAE Transactions; 7/1/2007; ; 700+ words
; ...airhandling system will be improved. The enthalpy exchanger (EE) is such equipment...the energy-saving performance of an enthalpy exchanger, such as the energy conservation...the latent heat effectiveness, and the enthalpy effectiveness, such as outdoor climate...
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Enthalpy of the B-to-Z Conformational Transition of a DNA Oligonucleotide Determined by Isothermal Titration Calorimetry
Magazine article from: Biophysical Journal; 11/1/2006; ; 700+ words
; ...then used to determine the enthalpy change upon increasing the...basepair. We attribute the enthalpy difference to the conformational...cal/mol basepair for the enthalpy of the B-Z transition compares...determinations of transition enthalpies with the appropriate choice...
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Binary enthalpy wheel humidification control in dedicated outdoor air systems.(Report)
Magazine article from: ASHRAE Transactions; 7/1/2007; ; 700+ words
; ...employ total energy recovery, or an enthalpy wheel (EW), by ANSI/ASHRAE/IESNA...Residential Buildings (ASHRAE 2004b). The enthalpy wheel transfers excess moisture and sensible...campus facility (Mumma and Jeong 2005). Enthalpy Wheel Overview In the mid 1970s, two...
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A thickness and enthalpy distribution sea-ice model
Magazine article from: Journal of Physical Oceanography; 10/1/2001; ; 700+ words
; ...has been extended to include sea ice enthalpy distribution. The extended theory conserves...thickness-distribution equation and an enthalpy-distribution equation. Both equations...of Hibler. The implementation of the enthalpy-- distribution equation allows the...
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A generalized formulation for evaluation of latent heat functions in enthalpy-based macroscopic models for convection-diffusion phase change processes
Magazine article from: Metallurgical and Materials Transactions; 6/1/2001; ; 700+ words
; ...problem is the so-called "fixed-grid enthalpy-based" method.[1] In this method, the enthalpy is related to the liquid volume fraction...phase-change considerations. Thus, the enthalpy updating scheme plays a pivotal role in...
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Enthalpy relaxation in bisphenol-A polycarbonate/poly(methyl methacrylate) blends.
Magazine article from: Polymer Engineering and Science; 3/1/2007; ; 700+ words
; ...compatibility can occur. The aim of this work is to study the enthalpy relaxation in single glass transition temperature ([T.sub...change during reactive blending and a strong dependence of enthalpy relaxation should be expected versus the mixing conditions...
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CRC handbook of enthalpy data of polymer-solvent systems.(Brief Article)(Book Review)
Magazine article from: SciTech Book News; 12/1/2006; 495 words
; 0849393612 CRC handbook of enthalpy data of polymer-solvent systems. Wohlfarth, Christian. CRC...as one that fills a vacuum in data books and databases detailing enthalpy changes (i.e., the sum of a system's internal energy plus...
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Flavonoids inhibit LDL oxidation in relation to their structure and enthalpy.
Newspaper article from: Heart Disease Weekly; 4/13/2003; 653 words
; ...Flavonoids inhibit LDL oxidation in relation to their structure and enthalpy. According to a study from Israel, "Twenty flavonoid compounds...by flavonoids in relation to their structure and calculated enthalpy. Phytochemistry, 2003;62(1):89-99). The corresponding...
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Pressure-enthalpy as a service tool.(refrigeration zone)
Magazine article from: Air Conditioning, Heating & Refrigeration News; 10/4/2004; ; 700+ words
; The pressure-enthalpy (P-H) diagram is a useful tool for refrigeration engineers and designers. It is also useful for service technicians. The...
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Missouri Inventors Develop Hydrocarbon Vapor Enthalpy Extractor
News Wire article from: US Fed News Service, Including US State News; 1/15/2007; 524 words
; ...Jan. 15 -- Arthur C. Fink Jr. of Lonedell, Mo., and Grenville G. Sutcliffe of Villa Ridge, Mo., have developed an enthalpy extractor for hydrocarbon vapors. According to the U.S. Patent & Trademark Office, the invention relates to a...
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enthalpy
Book article from: A Dictionary of Biology
enthalpy Symbol H . A thermodynamic property of...defined by H = U + pV , where H is the enthalpy, U is the internal energy of the system...the pressure remains constant and the enthalpy of reaction, Δ H , is equal...
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Heat
Book article from: Chemistry: Foundations and Applications
...measure the changes in internal energy and enthalpy that accompany chemical reactions. The...system's volume, and with the change in enthalpy of the system if the transfer takes place at constant pressure. The energy or enthalpy change accompanying a chemical reaction...
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Nernst, Walther Hermann
Book article from: Chemistry: Foundations and Applications
...equilibria depended on the free reaction enthalpy Δ G , which was a function of both the reaction enthalpy Δ H and the reaction entropy...equation: The problem was that, although enthalpy values could be calculated from thermal...
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Mollier, Richard
Dictionary entry from: Complete Dictionary of Scientific Biography
...that Mollier introduced the concept of enthalpy , a property of state that was then little...pressure and volume (the term “ enthalpy ” was coined later by Kamerlingh...Like Clausius ’ entropy, enthalpy is an abstract property that cannot be...
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free energy
Book article from: The Columbia Encyclopedia, Sixth Edition
...where Δ H is the change in the enthalpy of the system, T is the temperature...in entropy . A negative value of the enthalpy change indicates a decrease in the heat...states. It may happen that the change in enthalpy for the reaction is favorable but that...
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