What Does Hc Stand For Chemistry
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Chemistry Abbreviations Starting With H
h – Convection heat transfer coefficientHa – Hahnium HA – HemagglutininHACCP – Hazard Analysis and Critical Control PointsHAP – Hazardous Air PollutantHEPH – Heavy Extractable Petroleum HydrocarbonsHEU – Highly Enriched UraniumHIC – Household And Industrial ChemicalHL – Half-LifeHOMO – Highest Occupied Molecular OrbitalHOQS – Highest Occupied Quantum StateHP – High PressureHSAB – Hard and Soft Acids and BasesHSV – High Shear Viscosity
Standard Enthalpy Change Of Formation Hf
The standard enthalpy change of formation of a compound is the enthalpy change which occurs when one mole of the compound is formed from its elements under standard conditions, and with everything in its standard state.
The equation showing the standard enthalpy change of formation for water is:
When you are writing one of these equations for enthalpy change of formation, you must end up with 1 mole of the compound. If that needs you to write fractions on the left-hand side of the equation, that is OK.
The equation shows that 286 kJ of heat energy is given out when 1 mole of liquid water is formed from its elements under standard conditions.
Standard enthalpy changes of formation can be written for any compound, even if you can’t make it directly from the elements. For example, the standard enthalpy change of formation for liquid benzene is +49 kJ mol-1. The equation is:
If carbon won’t react with hydrogen to make benzene, what is the point of this, and how does anybody know what the enthalpy change is?
What the figure of +49 shows is the relative positions of benzene and its elements on an energy diagram:
How do we know this if the reaction doesn’t happen? It is actually very simple to calculate it from other values which we can measure – for example, from enthalpy changes of combustion . We will come back to this again when we look at calculations on another page.
And one final comment about enthalpy changes of formation:
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Chemistry Abbreviations Starting With I
I – electrical currentIAEA – International Atomic Energy AgencyIAQ – Indoor Air QualityICSC – International Chemical Safety CardICSD – Inorganic Crystal Structure DatabaseICSN – Institut de Chimie des Substances NaturellesIE – Inert ElectrolyteiHOP – information Hyperlinked Over Proteinsi.i.d. – independent and identically distributedIK – Inverse KinematicsIOCB – Institute of Chemistry and BiochemistryIOCM – International Organic Chemistry MeetingIPA – Isopropyl AlcoholISI – In-Situ Interferometer ISM – Industrial, Scientific, or MedicalIUPAC – International Union of Pure and Applied Chemistry
Other Uses In Science Technology And Mathematics
- 74HC-series integrated circuits, a logic family of integrated circuits
- Felix HC, a series of Romanian personal microcomputers produced by ICE Felix Bucharest and which were ZX Spectrum clones
- Hemianthus callitrichoides, a freshwater aquatic plant native to Cuba
- + h.c., a notation used in mathematics and quantum physics
- Hors catégorie , used in cycle races to designate a climb that is “beyond categorization”
- UCI .HC road cycling races , the second tier of events in the sport, after the UCI World Tour
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Abbreviations And Acronyms Used In Chemistry
- Ph.D., Biomedical Sciences, University of Tennessee at Knoxville
- B.A., Physics and Mathematics, Hastings College
Chemistry abbreviations and acronyms are common in all fields of science. This collection offers common abbreviations and acronyms beginning with the letters H and I used in chemistry and chemical engineering.
Standard Enthalpy Change Of Combustion Hc
The standard enthalpy change of combustion of a compound is the enthalpy change which occurs when one mole of the compound is burned completely in oxygen under standard conditions, and with everything in its standard state.
The enthalpy change of combustion will always have a negative value, of course, because burning always releases heat. Two examples:
- Enthalpy of combustion equations will often contain fractions, because you must start with only 1 mole of whatever you are burning.
- If you are talking about standard enthalpy changes of combustion, everything must be in its standard state. One important result of this is that any water you write amongst the products must be there as liquid water.
Similarly, if you are burning something like ethanol, which is a liquid under standard conditions, you must show it as a liquid in any equation you use.
- Notice also that the equation and amount of heat evolved in the hydrogen case is exactly the same as you have already come across further up the page. At that time, it was illustrating the enthalpy of formation of water. That can happen in some simple cases. Talking about the enthalpy change of formation of water is exactly the same as talking about the enthalpy change of combustion of hydrogen.
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Behavior Classification Physical/chemistrypa66/hc Binary System Utilized To Obtainseparation Membranes
Mara Zeni*, Jocelei Duarte and Venina dos Santos
Centro de Ciências Exatas e Tecnologias,Universidade de Caxias do Sul, Caxias do Sul, Brazil
- *Corresponding Author:
- Centro de Ciências Exatas e TecnologiasUniversidade de Caxias do SulCaxias do Sul, Brazil.
Received Date: September 16, 2015 Accepted Date: September 21, 2015 November 19, 2015
Citation: Zeni M, Duarte J, Santos Vdos. Behavior Classification Physical/Chemistry PA66/HC Binary System Utilized to Obtain Separation Membranes. Polym Sci. 2015, 1:1.
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Polymer-low molecular liquid systems, True solution, PA66/HC binary system
True Solutions of Polymers
The polymer used for the solutions and membranes preparation it is the polyamide 66 commercial supplied by Alfa Chem. Co. , in pellets. The solvents used in the solutions and membranes preparation were fuming hydrochloric acid with purity of 37-38% and formic acid with purity 98-100%, both supplied by Merck .The non-solvent used in the membranes preparation was distilled water. The information of the PA66 and the solvent properties are listed in Table 1. PA66 was dried for 2 hours at 90°C prior to each procedure performed .
Table 1: Characteristic data of the solvents and polymer investigated.
a = viscosimetric average molar mass b = PA66 density solid c = PA66 density in solution Source: BRANDRUP & IMMERGUT, 1989
|25 ± 2|
Chemistry Abbreviations Starting With F
f femto prefix FADE Fast Atomic Density EvaluationFAN Free Amino NitrogenFBC Fesser, Bishop and Campbell modelFBD Free Body DiagramFCCU Fluidized Catalytic Cracking UnitFCHC Face Centered Hyper-CubicFCS Fellow of the Chemical SocietyFCS Fire Control SystemFIGE Field Inversion Gel ElectrophoresisFIPS Fast Imaging Plasma SpectrometerFm FermiumFPLC Fast Performance Liquid ChromatographyFr FranciumFRS Fellow of the Royal SocietyFS Free State
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What Does Hc Stand For
What does HC mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: HC.
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Hc Meaning In Chemistry
- And finally again and again search .
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Chemistry Abbreviations Starting With A
A AtomAACC American Association for Clinical ChemistryAADC Amino Acid DeCarboxylaseAADC Aromatic L-Amino acid DeCarboxylaseAAS Atomic Absorption SpectroscopyABCC Advanced Biomedical Computing CenterABCC American Board of Clinical ChemistryABS Acrylonitrile Butadiene StyreneANSI American National Standards InstituteAO Aqueous Oxygen
BP BenzoPyreneBAP Benzyl Amino PurineBCAA Branched Chain Amino AcidBCC Body Centered CubicBeV Billion Electron Volt BFR Brominated Flame RetardantsBLEVE Boiling Liquid Expanding Vapor ExplosionBM Base MetalBMDL Below Method Detection LimitsBOD Biological Organic DepositBPDE BenzoPyrene-Diol-Epoxide BPE Boiling Point ElevationBPO Benzoyl PerOxideBTEX Benzene, Toluene, Ethylbenzene, and XyleneBTTN 1,2,4-ButaneTriol TriNitrate
CADS Chemical Agent Detection SystemCAR Commercial And ResidentialCBRE Chemical, Biological, Radiological ElementCBRN Chemical, Biological, Radiological, or NuclearCC Cubic CentimeterCCBA Chemical Coordinate Bonding and AdsorptionCCL Contaminant Candidate ListCDSL Chemical Data Summary ListCDU Chemical Dispensing UnitCFRP Carbon Fiber Reinforced Plasticcg centigramCRAP Crude Reagent And ProductsCRC Chemical Rubber CompanyCSAC Chemical Safety Analysis and ControlCSAD Cysteine Sulfinic Acid DecarboxylaseCSTR Continuously Stirred Tank ReactorCu CopperCVCS Chemical Volume Control SystemCW Chemical Warfare
What Is The Meaning Of Hc Abbreviation In Chemistry
What is HC definition ?
HC definition is “High Carbon”.
What does HC mean in Chemistry?
HC mean that “Hydrocarbon” for Chemistry.
What is HC acronym ?
HC acronym is “Hydrogen Chloride”.
What is shorthand of Hazardous Chemicals ?
The shorthand of “Hazardous Chemicals” is HC.
What is the definition of HC acronym in Chemistry?
Definitions of HC shorthand is “Hydrocarbon”.
What is the full form of HC abbreviation?
Full form of HC abbreviation is “Hydrocarbon”.
What is the full meaning of HC in Chemistry?
Full meaning of HC is “High Carbon”.
What is the explanation for HC in Chemistry?
Explanation for HC is “Hydrocarbon”.
What is the meaning of HC Abbreviation in Astrology ?
The site does not only include the meanings of the HC abbreviation in Chemistry. Yes, we know your main purpose is explanation of HC abbreviation in Chemistry. However, we thought that besides the meaning of the HC definitions in Chemistry, you can consider astrological information of HC acronym in Astrology. Therefore, the astrological explanation of each word in each HC abbreviation is also included.
HC Abbreviation in Astrology
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Standard Enthalpy Change Of Reaction Hr
Remember that an enthalpy change is the heat evolved or absorbed when a reaction takes place at constant pressure. The standard enthalpy change of a reaction is the enthalpy change which occurs when equation quantities of materials react under standard conditions, and with everything in its standard state.
That needs exploring a bit. Here is a simple reaction between hydrogen and oxygen to make water:
- First, notice that the symbol for a standard enthalpy change of reaction is H°r. For enthalpy changes of reaction, the “r” is often missed off – it is just assumed.
- The “kJ mol-1” doesn’t refer to any particular substance in the equation. Instead it refers to the quantities of all the substances given in the equation. In this case, 572 kJ of heat is evolved when 2 moles of hydrogen gas react with 1 mole of oxygen gas to form 2 moles of liquid water.
- Notice that everything is in its standard state. In particular, the water has to be formed as a liquid.
- And there is a hidden problem! The figure quoted is for the reaction under standard conditions, but hydrogen and oxygen don’t react under standard conditions.
Whenever a standard enthalpy change is quoted, standard conditions are assumed. If the reaction has to be done under different conditions, a different enthalpy change would be recorded. That has to be calculated back to what it would be under standard conditions. Fortunately, you don’t have to know how to do that at this level.