CSU CHEM 113 - Exam 1 Study Guide (7 pages)

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Exam 1 Study Guide



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Exam 1 Study Guide

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Chapter 16: Kinetics: Rates and Mechanisms of Chemical Reactions.


Pages:
7
Type:
Study Guide
School:
Colorado State University- Fort Collins
Course:
Chem 113 - General Chemistry II

Unformatted text preview:

CHEM 113 Exam 1 Study Guide Lectures 1 7 Chapter 16 Kinetics Rate and Mechanisms of Chemical Reactions Lecture 1 August 25 16 1 Focusing on Reaction Rate o What is a reaction rate The change in the concentrations of reactants or products as a function of time Under a given set of conditions each reaction has its own rate o What are the factors that affect reaction rate and how do they affect reaction rate Concentration affects rate by influencing the frequency of collisions between reactant molecules Physical state affects rate by determining how well reactants can mix Temperature affects rate by influencing the frequency and more importantly the energy of the collisions between reactant molecules Lecture 2 August 27 16 2 Expressing the Reaction Rate o The reaction rate is measured in terms of changes in concentrations of reactants or products per unit of time o There are three ways to describe rate Average rate Instantaneous rate Initial rate 16 3 The Rate Law and its Components o What is the rate law and what is it describing Rate k A m B n It expresses the rate as a function of concentrations and temperature o Reaction orders Each reactant gets and order There are three types of orders First order Second order Zero order The overall order of a reaction can be calculated by adding up the reaction orders of each reactant Lecture 3 August 29 16 3 The Rate Law and its Components Cont o Solving for the rate law Here is a general plan for solving various components of the rate law 1 Given Series of plots of concentration vs time From this we determine the slope of the tangent at t0 giving us the initial rate for each plot This was discussed the in previous lecture 2 Given Found Initial rates We then compare the initial rates when the concentration of A changes and B is held constant and vice versa This gives us the reaction orders This step is explained in more detail in the next section 3 Given Found concentrations and reaction orders We then can plug them into the



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