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Reaction cells

Nernst equation This equation relates the e.m.f. of a cell to the concentrations or, more accurately, the activities of the reactants and products of the cell reaction. For a reaction... [Pg.271]

In order to describe any electrochemical cell a convention is required for writing down the cells, such as the concentration cell described above. This convention should establish clearly where the boundaries between the different phases exist and, also, what the overall cell reaction is. It is now standard to use vertical lines to delineate phase boundaries, such as those between a solid and a liquid or between two innniscible liquids. The junction between two miscible liquids, which might be maintained by the use of a porous glass frit, is represented by a single vertical dashed line, j, and two dashed lines, jj, are used to indicate two liquid phases... [Pg.602]

Sound energy flux p, p. chemical cell reaction ... [Pg.107]

The electrons, Hberated at the anode, travel by electrical cable through the external load, such as an electric motor, to the cathode. If the external circuit is open the reaction is stopped, no fuel is consumed, and no power is generated. The electrolytic reaction, then, is controlled by the load connected to the cell. The overall fuel cell reaction is... [Pg.462]

Red mercuric oxide, identical chemically to the yellow form, is somewhat less reactive and more expensive to produce. An important use is ia the Ruben-MaHory dry cell, where it is mixed with graphite to act as a depolarizer (see Batteries). The overall cell reaction is as follows ... [Pg.114]

Common name Cell reactions Nomina 1 voltage Energy W-h/mL a content Wh/kg Comments Manufacturers... [Pg.516]

Common name Cell reaction Nominal W-h/L Wh/kg Comments... [Pg.517]

In a battery, the anode and cathode reactions occur ia different compartments, kept apart by a separator that allows only ionic, not electronic conduction. The only way for the cell reactions to occur is to mn the electrons through an external circuit so that electrons travel from the anode to the cathode. But ia the corrosion reaction the anode and cathode reactions, equations 8 and 12 respectively, occur at different locations within the anode. Because the anode is a single, electrically conductive mass, the electrons produced ia the anode reaction travel easily to the site of the cathode reaction and the 2iac acts like a battery where the positive and negative terminals are shorted together. [Pg.524]

Reaction Mechanisms. There is considerable difference of opinion concerning the specific cell reactions that occur ia the silver—ziac battery. Equations that are readily acceptable are... [Pg.554]

Tlie couple has a theoretical energy density of 172 W h/kg and complete cells are capable of deUvering 55-66 W-h/kg. Tlie cell reaction is... [Pg.559]

Iron—Air Cells. The iron—air system is a potentially low cost, high energy system being considered mainly for mobile appHcations. The iron electrode, similar to that employed in the nickel—iron cell, exhibits long life and therefore this system could be more cost effective than the ziac-air cell. Reactions iaclude ... [Pg.565]

Sodium—Sulfur. The best known of the high temperature batteries is the sodium [7440-23-5]—s Aiu.i. [7704-34-9] Na—S, battery (66). The cell reaction is best represented by the equation ... [Pg.586]

Fuel Cell Efficiency The theoretical energy conversion efficiency of a fuel cell ° is given by the ratio of the free energy (Gibbs function) of the cell reaction at the cell s operating temperature AG to the enthalpv of reaction at the standara state AH°, both quantities being based on a mole of fuel ... [Pg.2409]

The quantities Vj and are the stoichiometric coefficients for the fuel cell reaction, and andare the fugacities of fuel and oxygen in their respective streams. [Pg.2410]

Figure 21.2a shows a sample/reference half-cell pair for measurement of the standard reduction potential of the acetaldehyde/ethanol couple. Because electrons flow toward the reference half-cell and away from the sample half-cell, the standard reduction potential is negative, specifically —0.197 V. In contrast, the fumarate/succinate couple and the Fe /Fe couple both cause electrons to flow from the reference half-cell to the sample half-cell that is, reduction occurs spontaneously in each system, and the reduction potentials of both are thus positive. The standard reduction potential for the Fe /Fe half-cell is much larger than that for the fumarate/ succinate half-cell, with values of + 0.771 V and +0.031 V, respectively. For each half-cell, a half-cell reaction describes the reaction taking place. For the fumarate/succinate half-cell coupled to a H Hg reference half-cell, the reaction occurring is indeed a reduction of fumarate. [Pg.676]

Some typical half-cell reactions and their respective standard reduction potentials are listed in Table 21.1. Whenever reactions of this type are tabulated, they are uniformly written as reduction reactions, regardless of what occurs in the given half-cell. The sign of the standard reduction potential indicates which reaction really occurs when the given half-cell is combined with the reference hydrogen half-cell. Redox couples that have large positive reduction potentials... [Pg.676]

This is the isocitrate dehydrogenase reaction of the TCA cycle. Writing the two half-cell reactions, we have... [Pg.678]

Conventional batteries consist of a liquid electrolyte separating two solid electrodes. In the Na/S battery this is inverted a solid electrolyte separates two liquid electrodes a ceramic tube made from the solid electrolyte sodium /5-alumina (p. 249) separates an inner pool of molten. sodium (mp 98°) from an outer bath of molten sulfur (mp 119°) and allows Na" " ions to pass through. The whole system is sealed and is encased in a stainless steel canister which also serves as the sulfur-electrode current collector. Within the battery, the current is passed by Na+ ions which pass through the solid electrolyte and react with the sulfur. The cell reaction can be written formally as... [Pg.678]

The explicit aims of boiler and feed-water treatment are to minimise corrosion, deposit formation, and carryover of boiler water solutes in steam. Corrosion control is sought primarily by adjustment of the pH and dissolved oxygen concentrations. Thus, the cathodic half-cell reactions of the two common corrosion processes are hindered. The pH is brought to a compromise value, usually just above 9 (at 25°C), so that the tendency for metal dissolution is at a practical minimum for both steel and copper alloys. Similarly, by the removal of dissolved oxygen, by a combination of mechanical and chemical means, the scope for the reduction of oxygen to hydroxyl is severely constrained. [Pg.832]

Since the Cl- ions and the H+ ions are the only ions that take part in the cell reaction, the e.m.f. of the cell is given by... [Pg.231]

A Zn-Co3+ voltaic cell. A platinum electrode is immersed in a solution containing Co3+ and Co2+ ions.The spontaneous cell reaction is... [Pg.484]


See other pages where Reaction cells is mentioned: [Pg.209]    [Pg.366]    [Pg.86]    [Pg.86]    [Pg.468]    [Pg.580]    [Pg.175]    [Pg.516]    [Pg.562]    [Pg.563]    [Pg.572]    [Pg.472]    [Pg.117]    [Pg.75]    [Pg.76]    [Pg.97]    [Pg.2410]    [Pg.2411]    [Pg.2411]    [Pg.321]    [Pg.348]    [Pg.342]    [Pg.846]    [Pg.1220]    [Pg.1239]    [Pg.1244]    [Pg.483]    [Pg.485]   
See also in sourсe #XX -- [ Pg.642 , Pg.662 ]

See also in sourсe #XX -- [ Pg.810 ]




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Alkaline fuel cells electrode reactions

Alkylation reaction cells layer

Allergens eliciting cell-mediated reaction

Alloy composition cell reaction

Anode half-cell reaction

Anodic half-cell reaction

Atopic dermatitis cell-mediated reactions

Biocatalytic fuel cells electrochemical reactions

Biocatalytic fuel cells electron transfer reactions

Biochemical reactions, cell dimensions

Carbon reaction cell, atomic hydrogen

Catalysis of Fuel Cell Reactions

Catalytic reaction network, recursive cell

Catalytic reaction network, recursive cell production

Catalytic reaction network, recursive cell production and evolution

Cathode half-cell reaction

Cell Reaction and Equilibrium Constant

Cell design, electrolytic reactions

Cell potential half-reaction potentials

Cell potential reaction free energy

Cell reaction cells

Cell reaction cells

Cell reaction schemes

Cell reaction, definition

Cell reaction, representation

Cell reactions lead acid

Cell reactions lithium solid electrolyte

Cell reactions lithium thionyl chloride

Cell reactions mercury zinc

Cell reactions nickel cadmium

Cell reactions nickel zinc

Cell reactions silver zinc

Cell, amalgam reactions

Cell-containing redox reactions

Cell-containing transfer reactions

Cell-free systems conjugation reactions

Cell-free systems redox reactions

Cell-mediated Immune reactions

Cell-mediated Immune reactions discussion

Cell-mediated reactions

Cells overcharge reactions

Cells, reversible reactions

Change of Free Enthalpy in Chemical Reactions Reversible Cell Voltage

Chemical reaction engineering cell models

Chemical reaction in electrochemical cell

Chemical reactions half-cell

Collision / reaction cells applications

Collision / reaction cells bandpass

Collision / reaction cells cell gases

Collision / reaction cells fundamentals

Collision / reaction cells hexapole

Collision / reaction cells multipoles

Collision / reaction cells octapole

Collision and Reaction Cells

Collision/reaction cell

Collision/reaction cell octopole

Collision/reaction cell reactions

Collision/reaction cell technology

Controlling of the Electrochemical Reaction Rate by Electrode Potential and Cell Current

Coupled half-cell reactions

Coupled half-cell reactions kinetics

DMFC, half-cell reactions

Daniel cell electrochemical reaction, 194

Daniell cell electrochemical reaction, 245

Delayed-type hypersensitivity reactions cell proliferation

Diamond anvil cell high pressure chemical reactions

Direct methanol fuel cell reaction kinetics

Direct methanol fuel cell reaction models

Dynamic reaction cell

Dynamic reaction cell technology

Electrochemical Reactions in Fuel Cells

Electrochemical cell chemical reactions

Electrochemical cell reaction

Electrochemical cell redox reactions

Electrochemical cell side reactions

Electrochemical cells overall chemical reaction

Electrochemical half-cells fuel oxidation reaction

Electrochemical reaction cell coupled

Electrochemical reactions galvanic cell

Electrochemistry half-cell reactions

Electrode reactions and the cell reaction

Electrode reactions, fuel cells Nafion® polymer

Electrode reactions, fuel cells methanol concentrations

Electrode reactions, fuel cells oxygen reduction reaction

Electrode reactions, fuel cells platinum surface

Electrolysis electrolytic cell, redox reactions

Electrolysis half-cell reaction

Electrolytic Cells Using Electrical Energy to Drive Nonspontaneous Reactions

Electrolytic cell, redox reactions

Electron-transfer reactions photoelectrochemical cells

Food allergic reactions, cell-mediated

Formal cell reaction

Free energy of cell reaction

Fuel Cell Reactions and Thermodynamic Efficiencies

Fuel cell reactions

Fuel cell reactions, table

Fuel cells anodic reaction

Fuel cells cathodic reaction

Fuel cells electrode reactions

Fuel cells half-electrochemical reactions

Fuel cells oxygen radical reactions

Fuel cells reaction electrochemistry

Fuel cells reactions between

Galvanic cells redox reactions

Galvanic cells, activity chemical reaction

Generalized cell reaction

Granulomatous epithelioid cell reactions

Half-Cell Reactions and Nernst-Equation Calculations

Half-cell reactions

Half-cell reactions Nernst-equation calculations

Half-cell reactions definition

Half-cell reactions kinetics

Half-cells/reactions standard reduction potentials listed

Half-reactions electrochemical cells

Half-reactions in electrochemical cells

Half-reactions, in electrochemicals cells

High pressure reaction cell

Inflammatory cells reaction

Interference reduction collision/reaction cell

Kinetics of Coupled Half-Cell Reactions

Kinetics of Fuel Cell Reactions

Kinetics of Single Half-Cell Reactions

Lithium cell reaction

Lithium solid electrolyte, primary cell reactions

Mass filtering discrimination Collision/reaction cells

Mast cells late phase inflammatory reaction

Membranes, cell reaction

Mercury zinc, primary cell reactions

Minority control hypothesis, recursive cell reaction network

Multipole collision/reaction cell

Multipole collision/reaction cell discrimination

Natural killer cells cytotoxic reactions

Nickel cadmium, secondary cell reactions

Nickel zinc, secondary cell reactions

Nickel-cadmium battery cathode/anode/cell reactions

Non-noble Electrocatalysts for the PEM Fuel Cell Oxygen Reduction Reaction

One very important point cells corresponding to a net chemical reaction

Oxidation half-cell reaction

Oxidation-reduction reaction electrochemical cell

Oxidation-reduction reaction fuel cells based

Oxidation-reduction reactions concentration cells

Oxidation-reduction reactions fuel cells

Oxidation-reduction reactions galvanic cells

Oxygen evolution reaction catalysts cell reversal

Oxygen fuel cell, reaction

Oxygen/water half-cell reaction

Polarization Curves for a Single Half-Cell Reaction

Polarized half-cell reaction

Polymer electrolyte membrane fuel cell oxygen reduction reaction

Potential difference, electrical work done and AG for the cell reaction

Proton exchange membrane fuel cells electrochemical reactions

Proton-exchange membrane fuel cells reaction mechanisms

Reaction Cell or Interface Capability

Reaction cell, potentiometric sensors

Reaction wood cells

Reaction-diffusion cells

Reactions hydrogen/oxygen fuel cell

Reactions occurring at the electrodes in a redox cell

Reactions, in electrochemical cells

Redox Reactions and Electrochemical Cells

Redox reactions in electrolytic and galvanic cells

Redox reactions in galvanic cells

Redox reactions voltaic cells

SOFC, half-cell reactions

Sickle cell hemolytic transfusion reaction

Solar cells, redox reactions

Solid oxide fuel cell electrochemical reaction

Solid oxide fuel cells cathode, electrochemical reactions

Solid oxide fuel cells overall chemical reaction

Solid-oxide fuel cells reactions between

Standard equilibrium half-cell reactions

Standard reaction enthalpy from cell potential

Standard reaction entropy from cell potential

The Anode Half-Cell Reaction

The Cathode Half-Cell Reaction

The Generalized Cell Reaction

Thermodynamically favourable cell reaction

Thermodynamics electrochemical cell reactions

Transaminase-Catalyzed Reactions with Whole Cells

Transport phenomena and reactions in micro-fluidic aluminum-air fuel cells

Types of Half-Cell Reactions

Types of fuel cells, their reactions and operating temperatures

Unpacked cell, reaction

Using Reaction Mechanisms in a Collision Cell

Voltaic (or Galvanic) Cells Generating Electricity from Spontaneous Chemical Reactions

Voltaic Cells Using Spontaneous Reactions to Generate Electrical Energy

Voltaic cells spontaneous redox reactions

Whole-cell catalysts hydrolysis reactions

Whole-cell catalysts oxidation reactions

Whole-cell catalysts reactions

Whole-cell reactions

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