Modelling and Examining Open Circuit Voltage for PEM Fuel Cells
... At the anode side of the PEM fuel cell, the hydrogen will be ionized in the existence of platinum catalyst to release electrons and H+ ions in a process called oxidization, each molecule of hydrogen H2 will produce two free electrons and two positive ions. The existence of platinum catalyst is impor ...
... At the anode side of the PEM fuel cell, the hydrogen will be ionized in the existence of platinum catalyst to release electrons and H+ ions in a process called oxidization, each molecule of hydrogen H2 will produce two free electrons and two positive ions. The existence of platinum catalyst is impor ...
Chapter 5: Thermochemistry
... Enthalpy, H, is defined as the sum of the internal energy of a system plus the product of pressure and volume. H = E + PV ...
... Enthalpy, H, is defined as the sum of the internal energy of a system plus the product of pressure and volume. H = E + PV ...
PowerPoint - Chemistry Geek
... Spontaneous Processes and Entropy Entropy and the Second Law of Thermodynamics The Effect of Temperature on Spontaneity Free Energy Entropy Changes in Chemical Reactions Free Energy and Chemical Reactions The Dependence of Free Energy on Pressure Free Energy and Equilibrium ...
... Spontaneous Processes and Entropy Entropy and the Second Law of Thermodynamics The Effect of Temperature on Spontaneity Free Energy Entropy Changes in Chemical Reactions Free Energy and Chemical Reactions The Dependence of Free Energy on Pressure Free Energy and Equilibrium ...
MSTA WOW Chemistry
... Hydrogen peroxide, 30%, will act as an oxidizing agent with practically any substance. This substance is severely corrosive to the skin, eyes and respiratory tract; a very strong oxidant; and a dangerous fire and explosion risk. Do not heat this substance. Sodium iodide is slightly toxic by ingestio ...
... Hydrogen peroxide, 30%, will act as an oxidizing agent with practically any substance. This substance is severely corrosive to the skin, eyes and respiratory tract; a very strong oxidant; and a dangerous fire and explosion risk. Do not heat this substance. Sodium iodide is slightly toxic by ingestio ...
Construction of microcanonical entropy on
... To prove that all primitives must be of the form in Eq. (14) we consider the adiabatic manifolds, namely, the L-dimensional manifolds in the space (E,λ) identified by the condition that " = const, i.e., d" = ωδQ = 0. Note that the density of states is a strictly positive function ω = ∂"/∂E > 0. This ...
... To prove that all primitives must be of the form in Eq. (14) we consider the adiabatic manifolds, namely, the L-dimensional manifolds in the space (E,λ) identified by the condition that " = const, i.e., d" = ωδQ = 0. Note that the density of states is a strictly positive function ω = ∂"/∂E > 0. This ...
ME6301- ENGINEERING THERMODYNAMICS UNIT – I BASIC
... c. Prevention of the turbine from erosion. 11. List out the improvements made to increase the ideal efficiency of Rankine cycle. (N/D 2011) a. Lowering the condenser pressure. b. Superheated steam is supplied to the turbine. c. Increasing the boiler pressure to a certain limit. d. Implementing rehea ...
... c. Prevention of the turbine from erosion. 11. List out the improvements made to increase the ideal efficiency of Rankine cycle. (N/D 2011) a. Lowering the condenser pressure. b. Superheated steam is supplied to the turbine. c. Increasing the boiler pressure to a certain limit. d. Implementing rehea ...
Thermodynamic Characteristics of Solid
... its readiness to perform the heat work on it. That work corresponds with the oblique dashed area (see Fig. 2). The mentioned readiness is not a physical magnitude as yet, so the respective, explained above, the potential (energy measure) has been assigned to this intellectual magnitude (own heat ene ...
... its readiness to perform the heat work on it. That work corresponds with the oblique dashed area (see Fig. 2). The mentioned readiness is not a physical magnitude as yet, so the respective, explained above, the potential (energy measure) has been assigned to this intellectual magnitude (own heat ene ...
Document
... How many moles of CO2 can be produced from the combustion of 8.7 mol octane (C8H18)? (Use coefficients from balanced chemical equation to make a mole ratio) ...
... How many moles of CO2 can be produced from the combustion of 8.7 mol octane (C8H18)? (Use coefficients from balanced chemical equation to make a mole ratio) ...
EXAM 3
... A 5.000 g sample of a compound known to contain only the elements phosphorous and oxygen was analyzed and found to contain 2.182 g of phosphorous. Additional experiments indicate that this compound has a molecular weight of 283.9 g/mol. How many phosphorous atoms are present in each molecule of this ...
... A 5.000 g sample of a compound known to contain only the elements phosphorous and oxygen was analyzed and found to contain 2.182 g of phosphorous. Additional experiments indicate that this compound has a molecular weight of 283.9 g/mol. How many phosphorous atoms are present in each molecule of this ...
Chapter 18
... Heat Transfer Mechanisms There are three heat transfer mechanisms: Conduction: heat transfer through direct contact. Convection: Convection happens when a fluid comes in contact with an object whose temperature is higher than that of the fluid. Heat is transferred through the flow of the fluid. Rad ...
... Heat Transfer Mechanisms There are three heat transfer mechanisms: Conduction: heat transfer through direct contact. Convection: Convection happens when a fluid comes in contact with an object whose temperature is higher than that of the fluid. Heat is transferred through the flow of the fluid. Rad ...
2002 AP Chemistry Free-Response Questions
... Answer EITHER Question 2 below OR Question 3 printed on page 8. Only one of these two questions will be graded. If you start both questions, be sure to cross out the question you do not want graded. The Section II score weighting for the question you choose is 20 percent. 2. Answer parts (a) through ...
... Answer EITHER Question 2 below OR Question 3 printed on page 8. Only one of these two questions will be graded. If you start both questions, be sure to cross out the question you do not want graded. The Section II score weighting for the question you choose is 20 percent. 2. Answer parts (a) through ...
Chap-3
... Some general statements • The energy of the universe is constant • The First Law: – defines internal energy – states that heat is a form of energy. – states that energy is conserved ...
... Some general statements • The energy of the universe is constant • The First Law: – defines internal energy – states that heat is a form of energy. – states that energy is conserved ...
AJR Ch6 Thermochemistry.docx Slide 1 Chapter 6
... A state function is a property of a system that is determined by specifying its condition (in terms of temperature, pressure, internal energy, etc.). The value of a state function does not depend on the particular history of the sample, only its present condition. The change in the state function de ...
... A state function is a property of a system that is determined by specifying its condition (in terms of temperature, pressure, internal energy, etc.). The value of a state function does not depend on the particular history of the sample, only its present condition. The change in the state function de ...
File
... The three phases of matter (solids, liquids, and gases) have different properties. (3.1kk) A pure substance (element or compound) has a constant composition and constant properties throughout a given sample, and from sample to sample. (3.1r) Elements cannot be broken down by chemical change. (3.1u) ...
... The three phases of matter (solids, liquids, and gases) have different properties. (3.1kk) A pure substance (element or compound) has a constant composition and constant properties throughout a given sample, and from sample to sample. (3.1r) Elements cannot be broken down by chemical change. (3.1u) ...
MSDS - Dudley Chemical Corporation
... representation as to its comprehensiveness or accuracy. This document is intended only as a guide to the appropriate precautionary handling of the material by a properly trained person using this. Individuals receiving the information must exercise their independent judgment in determining its appro ...
... representation as to its comprehensiveness or accuracy. This document is intended only as a guide to the appropriate precautionary handling of the material by a properly trained person using this. Individuals receiving the information must exercise their independent judgment in determining its appro ...
4.2- Reaction Stoichiometry Reaction Stoichiometry
... 4.3 –Limiting reactant, Theoretical and percent Yield Limiting reactant or reagent(L.R)- The reactant that makes the least amount of the product and is completely consumed in the reaction that limits the amount of the product in a chemical reaction. Excess Reactant- Any reactant that occurs in a qu ...
... 4.3 –Limiting reactant, Theoretical and percent Yield Limiting reactant or reagent(L.R)- The reactant that makes the least amount of the product and is completely consumed in the reaction that limits the amount of the product in a chemical reaction. Excess Reactant- Any reactant that occurs in a qu ...
Chemistry Final Exam Review 2006-2007
... Yield sign Activity series Law of conservation of mass Subscript Combustion reaction Aqueous 4. Know how to predict products as in the problems below. Example: a) Al + N2 → b) H2O → c) Ca + H2O → d) Cl2 + NaBr → e) FeS + HCl → 5. What is an activity series chart? What type of reaction do you use it ...
... Yield sign Activity series Law of conservation of mass Subscript Combustion reaction Aqueous 4. Know how to predict products as in the problems below. Example: a) Al + N2 → b) H2O → c) Ca + H2O → d) Cl2 + NaBr → e) FeS + HCl → 5. What is an activity series chart? What type of reaction do you use it ...
9/6/12 - Note: Once it is downloaded, click SET
... - Distinguish between heat and temperature - Convert between Celsius and Kelvin Energy and Change - Energy is the capacity to do work, such as moving an object, forming a new compound, or generating light (Electromagnetic Energy) - Energy is always involved when there is a change of matter Changes i ...
... - Distinguish between heat and temperature - Convert between Celsius and Kelvin Energy and Change - Energy is the capacity to do work, such as moving an object, forming a new compound, or generating light (Electromagnetic Energy) - Energy is always involved when there is a change of matter Changes i ...
Chemical thermodynamics
Chemical thermodynamics is the study of the interrelation of heat and work with chemical reactions or with physical changes of state within the confines of the laws of thermodynamics. Chemical thermodynamics involves not only laboratory measurements of various thermodynamic properties, but also the application of mathematical methods to the study of chemical questions and the spontaneity of processes.The structure of chemical thermodynamics is based on the first two laws of thermodynamics. Starting from the first and second laws of thermodynamics, four equations called the ""fundamental equations of Gibbs"" can be derived. From these four, a multitude of equations, relating the thermodynamic properties of the thermodynamic system can be derived using relatively simple mathematics. This outlines the mathematical framework of chemical thermodynamics.