PPT-Rate of Reaction

Chapter 1 Reaction Rates What makes superglue bond instantly while Elmers glue does not What factors determine how quickly food spoils Why do glow sticks last longer when stored in the freezer. (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.. Lecture 17. Web Lecture 17. Class Lecture 22–Thursday 4/4/2013. . Energy and Chemical. Reactions. The reaction rate for a chemical system is defined as the time that it takes for the reactants to be converted into products. The faster this occurs, the faster the chemical reaction, and vice versa. . (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.. Lecture. 14. Pseudo Steady State Hypothesis (PSSH). Net rate of reaction of active . (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.. Lecture. 9. 1. Today’s lecture. Membrane Reactors: . Used for Thermodynamically Limited Reactions. The reaction mechanism is the . series of elementary steps. . by which a chemical reaction occurs.. The sum of the elementary steps must give the overall balanced equation for the reaction. The mechanism must agree with the experimentally determined rate law. Lecture 14 . Reaction Rates. Recall that we defined the rate of reaction as the rate of production of the products, or equivalently, the rate of consumption of the reactants.. Reaction rates for elementary reactions depend on:. (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.. Lecture 17. Web Lecture 17. Class Lecture 22–Thursday 4/4/2013. (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.. Lecture 18. Web Lecture 18. Class . Lecture . 23–Tuesday. Catalytic Mechanisms . Jaivime. A. . Evaristo. , Jane K. . Willenbring. . Department of Earth and Environmental Science. University of Pennsylvania, Philadelphia, PA 19104, USA. . Acknowledgement. GSA . On To the Future. Reaction Summary : S N 2, E2, S N 1/E1 Rate Competition: S N 2, S N 1/E1, E2 S N 2 S N 1 E1 E2 Optimize E2 rate: Factor 1: 3 o > 2 o >>1 o Factor 2: Strong Base: Factor 3: Good LG-weak CB Identify Type: 2H. 2. O. 2 . (l). . . 2 H. 2. O. (l). + O. 2 (g) . Identify Type: SiO. 2 . (l). . + 2C . (s). . . Si . (l). + . 2CO. . (g). . Does this reaction take place? . Stoichiometry. (identity and relative amounts of reactants and products).. Spontaneity (feasibility of the reaction, based on thermodynamics).. Speed…KINETICS (reaction rates).. Stopping…when will the reaction stop? (Equilibrium-next chapter). Reaction Mechanisms. The series of steps that actually occur in a chemical reaction.. Kinetics can tell us something about the mechanism. A balanced equation does not tell us . how. the reactants become products.. Step 1:. Energy must be . SUPPLIED. to break . bonds.. Step 2:. Energy is . RELEASED. when new bonds are . made.. A . reaction is . EXOTHERMIC. if more energy is RELEASED then . SUPPLIED (. hotter.