kinetics1

kinetics1 - Kinetics Part I Rates and Rate Laws Chemical...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Kinetics Part I – Rates and Rate Laws Chemical Kinetics : The study of the speed or rates of reaction. Reaction Rate : The change in concentration of a reactant or product per unit time. The reaction rate may change over time during the reaction. A reaction: A + 2B C + 3D Δ [ A ] Δ t = the rate of disappearance of A Δ [ D ] Δ t = the rate of appearance of D Notice that Δ [ D ] Δ t = 3 x Δ [ A ] Δ t General Reaction Rate: The rate of reaction is calculated by dividing the rate of disappearance or appearance of any reagent in the balanced equation by the coefficient of that reagent. In this reaction: Rate = Δ [ A ] Δ t = 1 2 Δ [ B ] Δ t = Δ [ C ] Δ t = 1 3 Δ [ D ] Δ t Factors that affect the rate of reaction 1. Concentration of reactants – for some chemical reactions, increasing the concentration of the reactants will result in an increase in reaction rate. Greater numbers of reactants per unit volume means more collisions between reactant molecules. 2. Temperature – Increasing the temperature may speed up a chemical reaction. At higher temperatures reactant molecules are moving more rapidly on average and so will contact each other more often and with more energy. 3.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/16/2008 for the course CHM 101 taught by Professor Scruggs during the Spring '07 term at ASU.

Page1 / 4

kinetics1 - Kinetics Part I Rates and Rate Laws Chemical...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online