Objective: Identify and describe factors that influence reaction rates. Warm-up: Why do we keep food in the refrigerator?

Slides:

Advertisements

Similar presentations

Kinetic Energy and Phase Changes. Diffusion Diffusion is the process by which molecules will move randomly in order to fill the space that they are in.

Advertisements

Section 16.2 Factors Affecting Reaction Rates

Chemical Reactions Alter Arrangements of Atoms Physical Science Chapter 7 Section 1.

How should customers take their Alka-Seltzer? The findings of 2-3 B.

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.

Physical and Chemical Changes Physical change: a change in which the chemical composition of the substance DOES NOT change. No new substances are made!

Controlling Chemical Reactions

FACTORS THAT AFFECT RATES OF REACTION

Chapter 7 Chemical Reactions.

Rates of Reaction and Particle Size

Honors Project By: Selena G. Lugo TEMPERATURE EFFECTS ON REACTION TIME.

Factors that Affect the Rate of Chemical Weathering.

Question of the Day ΔG determines whether or not a reaction will _____, but even a spontaneous reaction can be very _________. Day GO SLOW.

Key Question: What is the difference between exothermic and endothermic reactions. Warm-up: An increase in temperature makes a reaction ____________. (speed.

Section 3: Controlling Chemical Reactions Objectives: explain that every chemical reaction requires activation energy to get started list factors that.

Reaction Rates Collision Theory  In order for reactions to occur, particles must collide  If collisions are too gentle, no reaction occurs  If collisions.

23.4 Notes – Reaction Rates and Energy

Topic 2 - Speed of Reactions Chemical reactions can be fast: Like this explosion.

 Update your Table of Contents  Write your homework – leave it to be stamped  Get your test and your baby off the front counter if you want them! 

Lab-Temperature and Chemical Weathering AKA-”Watching Alka-Seltzer dissolve to simulate chemical weathering.”

Reaction rates course work

Kinetics Lesson 3 Collision Theory. The Collision Theory Link to Simulation of Molecular Motion 1.Matter is moving particles. 2.Temperature increases-

Reaction rate How quickly or slowly reactants are turned into products is called the reaction rate.

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.

Reaction Rates Speed matters! *Watch a Video!*. Reaction Rate Decrease in concentration of reactants with time or Increase in concentration of products.

“Reaction Rates” refers to HOW FAST A REACTION OCCURS.

 Update your Table of Contents  Write your homework – leave it to be stamped  Be sure to turn your Civil War Project in. Paper projects in (or under)

Warm Up: p12 What is the difference between an element compound and mixture? Compare and Contrast reactants and products. Date Session # ActivityPage #

Equilibrium. Rates of reaction Different reactions happen at different speeds. There are ways to speed up or slow down a reaction. Changing the surface.

Discussion Time. A should tell B and B should rephrase I know how to 1. A.????? B. Do you mean A.????? B. Do you mean A.?????

Reaction Rates. Reactions Over Time Any change that happens over a period of time can be expressed as a rate. A reaction rate is the rate at which reactants.

Rates of Reactions Chapter 13, Section 4. Rates of Reactions A reaction takes place only if the particles of reactants collide. The speed at which new.

Solution Process  “Surround and Separate”  Particles of the solvent pull particles of solute into solution.

Rates of Chemical Reactions. Review of chemical reactions What are the two parts involved in a chemical reaction? – Reactants and products Chemical reactions.

 When molecules or other particles of substances collide, they may react. The speed, or rate, of a given reaction depends upon several things.

Chapter5-3: Controlling Chemical Reactions Where does the energy come from to begin to light the match?

Chemical Reactions Factors that affect Reaction Rates.

 Reaction Rate  Catalyst  Concentration  Surface Area  Temperature  Enzyme  Catalytic converter.

KINETICS. Kinetics – What makes “superglue” bond instantly while Prit- stick does not? – What factors determine how quickly food spoils? – Why do “glow.

Reaction Theory: Collision, Activation and Potential Energy Diagrams (Chapter 16 Lesson 1&2)

Section 4 Rates of Change. Objectives Describe the factors affecting reaction rates. Describe the factors affecting reaction rates. Explain the effect.

FACTORS THAT AFFECT RATES OF REACTION

Reaction Rates.

DO NOW Pick up notes We All Scream for Ice Cream lab is due Wednesday.

Reaction Rates.

Reaction Rates.

Objective: To describe how temperature affects the rate of reaction

Define “rate,” OR give an example of a rate

Chapter 17A General Chemistry Mr. Mata

Factors Affecting the Rate of Chemical Reactions

What things affect the rate of reactions?

Sec 2 Rates of Chemical Reaction

Rates of Reactions.

LAB RECAP: Spot, Spot....

Collision theory.

6.2 Factors Affecting the Rate of Chemical Reactions

Ch. 19 Reaction Rates and Equilibrium

ENERGY & RATES OF REACTION

Reaction Rates.

Section 1 – Controlling the Rate of Reaction

Factors Affecting the Rate of Reaction

Chapter 17 General Chemistry Mr. Mata

Concentration and Collisions

Factors Affecting Reaction Rates

ENERGY & RATES OF REACTION

Unit 8 Kinetics and Rates of Reactions

Presentation transcript:

Objective: Identify and describe factors that influence reaction rates. Warm-up: Why do we keep food in the refrigerator?

How Can You Speed Up or Slow Down a Reaction ?

Experiment 1: The Effect of Temperature on Reaction Rates Reaction Times at Different Temperatures Hot Water Room Temp. Cold Water ________ C _________ C _________ C

Experiment 1: The Effect of Temperature on Reaction Rates Summary: As the temperature increases, the rate of reaction… Questions: 1. At a temperature of 10 degrees C, it would take ______ seconds for 1 Alka-Seltzer tablet to react with 8 oz. of water. 2. If the temperature is doubled from 20 degrees C to 40 degrees C, the time for the rate of reaction ______by approximately _______. 3. Using hot tap water, the rate was ______ times faster than at 0 degrees C. increases

Experiment 2: The Effect of Particle Size on Rate of Reaction Particle Size Time for Reaction to be Completed Whole Tablet _________ Seconds 8 Pieces _________Seconds Powder _________Seconds

Experiment 2: The Effect of Particle Size on Rate of Reaction Summary: a) As particle size decreases, the rate of reaction ___________. b) The rate of reaction for the powder was ___________ times faster than for the whole tablet. Questions: 1. As particle size decreases, the total surface area of a reactant ________________. As a result, the probability of interactions between atoms/ions ________________, and the rate of reaction ___________________. 2. Particle size appears to have _______________ (less or more) of an effect on the rate of reaction than temperature. increases less