Reaction Rates reaction rate: a measure of how fast reactions happen – based on collisions of atoms and molecules ex. explosive and biological reactions.

Slides:



Advertisements
Similar presentations
Reaction Rate The rate of a reaction is the speed at which a reaction happens It can be measured as the 'rate of formation of product' Or the ‘rate of.
Advertisements

What is ? Collision theory? Rate of reaction Activation energy?
Energy Changes & Reactions Rates
Mini-Unit 12: Reaction Rates and Equilibrium
Chemical Kinetics The Study of Reaction Rates. Why Such a Vast Difference in Reaction Rates? Reaction speeds can range from the very slow (rotting of.
Noadswood Science,  To be able to measure the rate of reaction Tuesday, September 08, 2015.
MAKING NYLON:
Standard 8: Reaction Rate Chemistry Ms. Siddall. There are 4 factors that affect the rate of a reaction: 1.Temperature: Increasing temperature = more.
Lesson 1. Starter What makes “superglue” bond instantly while regular glue does not? What factors determine how quickly food spoils? Why do “glow sticks”
Topic 2 - Speed of Reactions Chemical reactions can be fast: Like this explosion.
Reaction rates course work
Topic 8 – Reaction Rate Science 9 - Chemistry. Chemical Reactions involving oxygen 1. COMBUSTION - oxygen reacts with a substance to from a new substance.
Rate of Reaction – Collision Theory2007 R. Mulenga Starter.
Topic 4. Collision theory Chemical reactions only occur when reacting particles collide with each other with sufficient energy. The minimum amount of.
1. 2 How Substances Dissolve Solids dissolve in liquids at the surface Water molecules are moving  Polar molecules Positive and negative areas Solid.
Controlling Chemical Reactions Learning Objectives  Describe the relationship of energy to chemical reactions.  List factors that control the.
Reaction Rates What factors influence the rate of chemical reactions?
Chapter 7.4. * Reaction Rates tell you:  the rate that reactants change into products * Fast or slow, controlled or uncontrolled - total amount of energy.
Standard 8: Reaction Rate Chemistry Ms. Siddall. Reaction rate = speed of reaction Example An explosion happens quickly Rusting happens slowly 8a: Measuring.
Controlling Chemical Reactions
Kinetics & Equilibrium Ted.ed. Review  A chemical equation describes a chemical change (reaction). 2NO(g) + O 2 (g)  2NO 2 (g)BEFOREReaction!Reaction!After.
 When molecules or other particles of substances collide, they may react. The speed, or rate, of a given reaction depends upon several things.
RATES OF REACTION. Rates of Reaction The rate of a chemical reaction is the speed at which the reaction occurs (i.e. speed at which the reactants are.
6.2 - Factors Affecting the Rate of Chemical Reactions Rate of reaction refers to how quickly or slowly the reactants in a chemical reaction turn into.
 Reaction Rate  Catalyst  Concentration  Surface Area  Temperature  Enzyme  Catalytic converter.
Rate of Reaction. Rates of chemical reactions Reaction rate - how quickly reactants turn into products.
UNIT 8: KINETICS & EQUILIBRIUM Lecture 1: Collision Theory.
Rates of Reactions Teacher Version.  Rate measures how fast or slow a chemical reaction occurs  Who cares about rates of reactions? ◦ Chemical engineers.
Unit 11 Review Created by Mrs. Martin. 1. List the 6 factors that affect the rate of a reaction.
Reaction Rates Reactions over time -Different reactions have different durations (can be measured over time) -TNT almost instantly, leaves changing color.
Controlling chemical Reactions Background information you need to know What is the difference between matter and energy? ______________________________.
Kinetics What do you understand about rate of reaction?
Reaction Rates Standard 8: Matter SC.912.P.10.5 SC.912.P.10.7
Reactions rate and Collision Theory
Chemical Kinetics T2 T2 Edexcel new Specification T1 T1 Application of
Mr. Quinn & Ms. Tom March 17, 2014 Aim: Why do the factors we have studied affect rate of reaction? Do Now: What effect do the factors.
Unit 10: Energy in Chemical Reactions
Reaction Rates.
6.2 Factors Affecting the Rate of Chemical Reactions
6.2 Factors Affecting the Rate of Chemical Reactions
Reaction Rates Quiz Thurs, March 10.
Links Keywords C5 Monitoring and Controlling Chemical Reactions
Controlling Chemical Reaction Lesson 10
Reaction Rates.
2. Classifying based on energy transfer
Unit 11: Energy of Reactions
Reaction Rates & Collision Theory.
11/17/15 ll ork Complete all Bell Work for the week on a sheet of paper. Turn it in by Friday!! 2: Why is there a little “hill” in a energy.
Reaction Rates.
Rates of Chemical Reactions
Sec 2 Rates of Chemical Reaction
Which arrow represents the activation energy? What are the others?
Rates of Reaction Unit 8.
Kinetic Molecular Theory
LAB RECAP: Spot, Spot....
Collision theory.
Ch. 19 Reaction Rates and Equilibrium
You may have heard of athletes “burning Calories” when they exercise.
Get Ready! Today’s Agenda 5-in-5 Rate of Reaction Notes Lab
#54 Rate of reactions Textbook pages D74-76.
RATES OF REACTION.
Section 3 – pg 234 Controlling Chemical Reactions
Rate Affecting Factors
By Lenina, Vicky and Jade
Title: Reaction Rates Complete the activity listed below
Learning Objective To be able to:
Presentation transcript:

Reaction Rates reaction rate: a measure of how fast reactions happen – based on collisions of atoms and molecules ex. explosive and biological reactions are very fast and iron rusting is very slow. Reaction rate is measured by the rate of decrease in concentration of reactants or as the rate of increase in concentration of the products 6 CO2 + 6 H2O  C6H12O6 + 6 O2

Reaction Rates Concentration, temperature, surface area, and pressure are major factors Increasing the concentration of reactants increases the number of collisions Ex. More oxygen  better burning

Reaction Rates Increasing temperature increases the number of collisions  greater kinetic energy increases the chances of each collision leading to a reaction Ex. Food spoils slower and glow sticks last longer in fridge Increasing pressure increases the reaction rate only when one or more of the reactants or products are gases. With gaseous reactants, increasing pressure is the same as increasing concentration  increased reaction rate

Reaction Rates Increasing surface area increases the number of collisions  increased reaction rate -as such, smaller particles increase reaction rate

Reaction Rate Scenarios Write down whether the following will increase or decrease a reaction rate and explain why. 1. Lowering the temperature of reactants. 2. Diluting an aqueous solution of HCl with water before adding a piece of magnesium. 3. Grinding a solid into fine particles. 4. Increasing the pressure of a mixture of gases.