{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Ch_06_summary - CHAPTER 6 KINETICS(IB TOPICS 6 AND 16...

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

View Full Document Right Arrow Icon
CHAPTER 6 KINETICS (IB TOPICS 6 AND 16) SUMMARY © IBID Press 2007 1 Reaction rate Rate of a reaction is the decrease in the concentration of a reactant or the increase of the concentration of a product with unit time. For a A b B, t B b t A a rate Δ Δ = Δ Δ = ] [ 1 ] [ 1 ; rate is a positive quantity. Rates can be determined by measuring the change in the concentration of a reactant or product with time. Possible methods are pressure measurements for gases using a manometer or pressure gauge, volume measurement for gases using a gas syringe, color changes using a colorimeter or spectrophotometer, heat changes using a thermometer, mass changes using a balance, pH changes using a pH meter, titrations, etc. Collision Theory The reactant particles must collide together. Particles must have the correct geometrical alignment. Particles must have a minimum energy of a E E , the activation energy. Activation energy is the minimum energy required for reactants to react in order to convert into products (via a transition state or activated complex). Transition state is an unstable arrangement in which the bonds are in the process of being broken and formed and presents the maximum point on a potential energy diagram; it can not be isolated. Factors that Influence Rates of Reactions Increase in concentration: Greater number of particles per unit volume per time means greater frequency of collisions and faster rate. Increase in temperature: This causes an increase in average kinetic energy; particles collide more frequently and more forcefully. Thus number of particles with a E E increases greatly and rate increases (more forceful collisions is a more important factor than more frequent collisions). Increasing the surface area of solids reactants: This increases the number of particles that can collide, i.e., increases the frequency of successful collisions.
Image of page 1

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

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

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern