Key concepts from last class • The internal energy, U, is the total
... At constant pressure, as you increase the temperature, the volume will increase pushing the piston up. That means you are performing work, and part of the heat from the burner is wasted (you need more energy to produce the same increase in temperature). Changes in volume are negligible for solids an ...
... At constant pressure, as you increase the temperature, the volume will increase pushing the piston up. That means you are performing work, and part of the heat from the burner is wasted (you need more energy to produce the same increase in temperature). Changes in volume are negligible for solids an ...
CHEMISTRY SEC 06 SYLLABUS
... chemistry. It requires students to master a necessary body of information and basic knowledge about chemistry. It also aims to present chemistry and the work of chemists as having a profound impact on society and its cultural and physical environment. It is envisaged that the examination papers will ...
... chemistry. It requires students to master a necessary body of information and basic knowledge about chemistry. It also aims to present chemistry and the work of chemists as having a profound impact on society and its cultural and physical environment. It is envisaged that the examination papers will ...
EIT Review S2012 Part 2 Dr. J. Mack CSUS Department of Chemistry
... • Concentration data can be used to calculate equilibrium constants for both aqueous and gaseous systems. • In these cases, the symbol K is sometimes given the subscript “c” for “concentration,” as in Kc. • For gases, however, equilibrium constant expressions can be written in another way: in ...
... • Concentration data can be used to calculate equilibrium constants for both aqueous and gaseous systems. • In these cases, the symbol K is sometimes given the subscript “c” for “concentration,” as in Kc. • For gases, however, equilibrium constant expressions can be written in another way: in ...
Red-ox reactions Electochemistry
... •The maximum useful work that can be obtained from a reaction is: ...
... •The maximum useful work that can be obtained from a reaction is: ...
day_3_main_lecture - the Essentially Science Wiki!
... – How many moles of H2O are produced from the reaction of 2 moles of H2? – How many moles of O2 are required to produce 4 moles of H2O? ...
... – How many moles of H2O are produced from the reaction of 2 moles of H2? – How many moles of O2 are required to produce 4 moles of H2O? ...
Department of Chemistry
... Rate analysis, modern experimental techniques, theories of chemical kinetics, selected topics in gas phase and solution kinetics, characterization of transition states by ab-initio methods. Alternate years. CHEM 324 Electrochemistry 3.0; 3 cr. Fundamentals and applications of electrochemistry. O ...
... Rate analysis, modern experimental techniques, theories of chemical kinetics, selected topics in gas phase and solution kinetics, characterization of transition states by ab-initio methods. Alternate years. CHEM 324 Electrochemistry 3.0; 3 cr. Fundamentals and applications of electrochemistry. O ...
Magic of Chemical Reactions 2. - mt
... What are the steps of writing a chemical equation? 1. The symbols or molecular formulae of the reactants are written on the left hand side and products are on the right hand side. 2. Reactants and products are connected with an arrow () pointing towards product side. 3. Whenever there are two or mo ...
... What are the steps of writing a chemical equation? 1. The symbols or molecular formulae of the reactants are written on the left hand side and products are on the right hand side. 2. Reactants and products are connected with an arrow () pointing towards product side. 3. Whenever there are two or mo ...
Transition state theory
Transition state theory (TST) explains the reaction rates of elementary chemical reactions. The theory assumes a special type of chemical equilibrium (quasi-equilibrium) between reactants and activated transition state complexes.TST is used primarily to understand qualitatively how chemical reactions take place. TST has been less successful in its original goal of calculating absolute reaction rate constants because the calculation of absolute reaction rates requires precise knowledge of potential energy surfaces, but it has been successful in calculating the standard enthalpy of activation (Δ‡Hɵ), the standard entropy of activation (Δ‡Sɵ), and the standard Gibbs energy of activation (Δ‡Gɵ) for a particular reaction if its rate constant has been experimentally determined. (The ‡ notation refers to the value of interest at the transition state.)This theory was developed simultaneously in 1935 by Henry Eyring, then at Princeton University, and by Meredith Gwynne Evans and Michael Polanyi of the University of Manchester. TST is also referred to as ""activated-complex theory,"" ""absolute-rate theory,"" and ""theory of absolute reaction rates.""Before the development of TST, the Arrhenius rate law was widely used to determine energies for the reaction barrier. The Arrhenius equation derives from empirical observations and ignores any mechanistic considerations, such as whether one or more reactive intermediates are involved in the conversion of a reactant to a product. Therefore, further development was necessary to understand the two parameters associated with this law, the pre-exponential factor (A) and the activation energy (Ea). TST, which led to the Eyring equation, successfully addresses these two issues; however, 46 years elapsed between the publication of the Arrhenius rate law, in 1889, and the Eyring equation derived from TST, in 1935. During that period, many scientists and researchers contributed significantly to the development of the theory.