What did the bartender say when oxygen hydrogen sulfur sodium and phosphorous walked into his bar? OH SNaP!

Slides:



Advertisements
Similar presentations
Reaction Rates What affects the rate of reaction?.
Advertisements

Endothermic Vs. Exothermic Reaction Graphs. Endothermic Reaction: a reaction in which the products have more stored energy than the reactants. The reaction.
Enthalpy Changes in Chemical Reactions. Enthalpy Enthalpy (H) The “heat content” of a substance It is the total KE and PE of a substance at constant pressure.
Aim: How to interpret potential energy diagrams? A catalyst provides an alternate reaction pathway, which has a lower activation energy than an uncatalyzed.
Spring Semester Final Exam Review
Thermochemistry.
Kinetics and Equilibrium. Kinetics The branch of chemistry known as chemical kinetics is concerned with the rates of chemical reactions and the mechanisms.
Section 10.1 Energy, Temperature, and Heat Why Do Things Happen?
1 What is the collision theory, and how does it relate to reaction rates? Particles must collide and break the existing bonds so they can form new ones.
Energy Changes in Reactions. Aims of lesson: To discuss energy changes in chemical reactions. To draw potential energy diagrams for exothermic and endothermic.
{ Exothermic & Endothermic REACTIONS Energy in Reactions.
Unit 8: Kinetics and Equilibrium Catalysts. Do Now Label the parts of the potential energy diagram.
Plants can create their own food. What is this process called? 1.Respiration 2.Photosynthesis 3.Conservation of Matter 4.All of the above Gas A H2OH2O.
1 Thermochemistry 2 Chemical reactions are accompanied by changes in energy.
Lecture B. Day 4 Activities: Exothermic or endothermic? Objectives –Be able to identify exothermic and endothermic reactions based on temperature change.
MODULE 5 Energy and Thermodynamics. Thermodynamics & Energy Thermodynamics - The science of heat and work Work - A force acting upon an object to cause.
Potential Energy Diagrams. Drill – 5/22/08 1. What is the general rate law format? 2. For the following rate law R = k[H 2 ] 2 [O 2 ] If the concentration.
Thermodynamics They study of energy and its transformations.
Collision Theory. Use the Collision Theory to explain the rate of chemical reactions. Include: Activation energy Draw potential energy diagrams for various.
Kinetics The study of the mechanisms of a reaction and the rates of reaction.
Unit 8 – Notes Page 7 Endothermic and Exothermic Reactions.
Chapter 20: Chemical Reactions and Energy
STAAR Ladder to Success Rung 9. Energy Defined as the ability to do work or produce heat Many forms – Light energy – Nuclear energy – Electrical energy.
ENERGY EXCHANGES IN CHEMICAL REACTIONS
Potential Energy Diagrams. For a given reaction, the Activation Energy and the Enthalpy of Reaction can be shown graphically in a Potential Energy Diagram.
Collision Theory. Use the Collision Theory to explain the rate of chemical reactions. Include: Activation energy Draw potential energy diagrams for various.
Factors Affecting RXN Rates Nature of Reactants Temperature Concentration Surface Area Catalysts/ Inhibitors.
ENTHALPY. OBJECTIVES  Exothermic changes cause heat to be released to the surroundings  Endothermic changes cause absorption of heat from the surroundings.
Key Terms Average kinetic energy - Energy associated with the movement of matter and mass Bond energy - The amount of energy it takes to break one mole.
Chemistry I Chapter 10 Review Calorie – energy needed to raise temp. of 1g of water 1 o C Energy – ability to do work or produce heat Endothermic – energy.
Energy Diagrams: Drawing it Out. Why are we learning this? Energy diagrams show how a reaction works. Energy diagrams display The energy of reactants.
18.3 Enthalpy Changes in Chemical Reactions Molecules are held together by chemical bonds. The chemical energy in a molecule is a measure of the energy.
Enthalpy Changes in Chemical Reactions Lesson #4.
ENERGY AND CHEMICAL CHANGE CH. 16 Energy is the ability to do work or produce heat and is found in two forms potential energy is energy due to the composition.
Thermodynamics Chemistry. Thermodynamics The study of energy changes in physical and chemical processes.
THERMOCHEMISTRY.
Potential Energy Diagrams
Endothermic & Exothermic Reactions
Kinetics and Equilibrium
Endothermic & Exothermic Reactions
Tro's "Introductory Chemistry", Chapter 3
Unit 5: Thermochemistry
Kinetics Lesson 4 PE Diagrams.
Heat of Reactions.
Heat and Endothermic and Exothermic Reactions
Reaction Rates and Activation Energy
CHEMICAL KINETICS.
IV. Reaction Energy (p ) Ch. 17 – Chemical Reactions IV. Reaction Energy (p )
Endothermic and Exothermic Reactions
14.3 Energy and Reactions.
Thermodynamics.
Energy in Rxns & Potential Energy Diagrams
Potential Energy Diagrams
Energy Changes in Reactions
14.3 Energy and Reactions.
KINETICS : POTENTIAL ENERGY OF REACTION GRAPH
14.3 Energy and Reactions.
Energy in Chemical Reactions
DO NOW Get out homework handout Pick up notes.
Exothermic and Endothermic Reactions
Warm-Up 3/19/14 Balance these equations!.
Endothermic Vs. Exothermic Reaction Graphs
Bell Work: Kinetics Intro
Review Activation Energy Diagrams and Rate Laws
Energy in Chemical Reactions
Aim: How to represent the energy change in a system?
Potential Energy Diagrams
2.2 Energy- the ability to do work
Kinetics Lesson 4 PE Diagrams.
Presentation transcript:

What did the bartender say when oxygen hydrogen sulfur sodium and phosphorous walked into his bar? OH SNaP!

Potential Energy Diagrams

Types of Energy Kinetic  the energy of motion Potential  stored energy The total amount of energy in a system is conserved (no Energy lost) but it is converted (changed) into different forms

The energy of any object is the sum of its kinetic and potential energies At collision point, the energy in the system is 100% potential energy due to repulsion of valence electrons

Enthalpy ∆H Reactions give off heat energy ∆H = H products -H reactants H products > H reactants  endothermic (gets colder) H products < H reactants  exothermic (gets hotter)

PE diagram (exothermic) Insert from notes

Exothermic Examples – Burning – Heat packs

PE diagram (endothermic)

Endothermic Examples – Colp packs – Photosynthesis – Electrolysis of water

PE diagram (catalyst) +ve catalyzed reaction with have an increased reaction rate because the reactants can achieve a lower E A.

N2(g) + 2O2(g)  2NO 2(g) When ∆H = +10kcal and E A(f) = 65 kcal; include position of activated complex, a value for E A(f) and show the effect of a positive catalyst