Chemistry—Chapter 2 ENERGY. What is ENERGY? (list types of energy) The ability to do WORK. What is WORK? The ability to move something, create a new compound.

Slides:

Advertisements

Similar presentations

Chapter 2 sec 1 Intro Energy.

Advertisements

Applications of Heat and Energy

Energy – The capacity for doing work The ability to change matter.

Section 10.1 Energy, Temperature, and Heat Why Do Things Happen?

Changes in Matter Chapter 2 Section 3.

Chapter 2 Energy in the Atmosphere. Energy It’s what makes things happen.

Thermochemistry The Basics of Heat Transfer. The Flow of Energy Thermochemistry - concerned with heat changes that occur during chemical reactions.

Thermochemistry the study of the transfer of energy between reacting chemicals and their surroundings.

Just What Is It How Can We Define Energy The capacity to do work Or the ability to cause a change to occur.

The Nature of Energy u Energy is the ability to do work or produce heat. u It exists in two basic forms, potential energy and kinetic energy.

What is the relationship between heat and temperature?

Unit: Thermochemistry Heat, Temperature, Energy Conversions.

Energy Chapter 2 Section 1.

Heat energy is due to the movement of atoms or molecules. As atoms move faster they create more energy = causing Heat!

 The ability to do work  The ability to transfer heat Two types: Kinetic and Potential.

Energy in Chemical & Physical Changes

Thermochemistry and Energy Water freezing and boiling at the same time, really?!

Bellringer Work in small groups to brainstorm ideas relating to energy. List different types of energy, list why energy is important, and when energy is.

Heat: Phase Change. 'change of phase' 'change of state'. The term 'change of phase' means the same thing as the term 'change of state'. o These changes.

TEKS 11B: Understand the law of conservation of energy and the processes of heat transfer. What are the ways in which energy changes can occur? Thermochemistry.

Food and Energy The Basics of Heat Transfer. The Flow of Energy Thermochemistry - concerned with heat changes that occur during chemical reactions.

Energy. Energy The capacity to do some kind of work. The capacity to do some kind of work. Involved when there is a change in matter Involved when there.

Do not copy any notes in light green lettering! Physical Change Change in size, shape or physical state that does not change actual substance.

Friday, Sept. 20 th : “A” Day Monday, Sept. 23 rd : “B” Day Agenda  Ch 1 Tests  Start Ch. 2: Matter and Energy  Section 2.1: “Energy” Energy, physical/chemical.

Matter and Energy.

Section One Energy Energy: is the capacity to do some kind of work, such as moving an object. Examples: No matter how energy is defined, it is always involved.

Heat Energy and Chemical Equations Part 1: Changes in Matter & Energy Balancing Equations Types of Reactions.

Chapter 10 Energy. Section 10.1 The Nature of Energy Return to TOC Copyright © Cengage Learning. All rights reserved 2 Energy is anything that has the.

Thermochemistry the study of the transfer of energy between reacting chemicals and their surroundings.

Thermal Energy A. Temperature & Heat 1. Temperature is related to the average kinetic energy of the particles in a substance.

THERMO- CHEMISTRY Thermochemistry Study of the heat changes that occur during a chemical reaction.

Section 10.1 Energy, Temperature, and Heat Thermochemistry.

LecturePLUS Timberlake 991 Chapter 2 Energy and States of Matter Measuring Heat Energy Energy and Nutrition.

Section 1.   Chemical Energy:  Energy that matter possess because of its chemical makeup.  Where does the energy come from?  Movements of the atoms.

NOTES: 17.1 – Thermochemistry – The Flow of Energy

Energy and Chemistry Chemical Reactions Process by which substances interact to form new substances. Reactants- substances you start with, or what reacts.

Thermochemistry Energy Heat Thermochemical Equations Calculating Enthalpy Change Reaction Sponteneity.

Matter and Energy Pg  All physical and chemical changes involve a change in energy  Energy goes in or energy comes out.  If energy goes in.

Heat and Energy of Ractions Chapter 10 Energy World of Chemistry Zumdahl Last revision Fall 2009.

Energy & Heat notes. Energy Energy is the ability to do work Energy exists in many different forms Can you think of any? Kinetic Energy Potential Energy.

Chapters 13 & 17 Phases and Heat. Phases There are three phases, or states, that we will discuss  Solid  Liquid  Gas.

Chapter 2 Matter and Energy. Energy Energy—the capacity to do work Where does your energy come from? Can be in the forms: light, heat, chemical, mechanical,

Energy, Temperature, and Kinetic Energy. States of matter Solids  fixed volume and shape  particles are held tightly in place  particles vibrate slightly.

Heat and Energy of Ractions Chapter 10 Energy World of Chemistry Zumdahl Last revision Fall 2009.

The Nature of Chemical Reactions Chapter 7.1 Notes.

ENERGY. Energy Ability to do work Kinetic Energy Energy of motion Potential Energy Stored energy Temperature Measure of the Average Kinetic Energy of.

Ch. 17 Thermochemistry and Energy A liquid freezing and boiling at the same time, really?!

Energy Chapter 15 Mr. Smith’s favorite definition for chemistry How energy interacts with matter.

Just What Is It How Can We Define Energy The capacity to do work Or the ability to cause a change to occur.

Thermochemistry Chapter 10. Warm Up A deep underground cavern contains 2.24 X 10 6 L of methane gas at a pressure of 1.50 x 10 3 kPa and the temperature.

Thermochemistry Thermo = heat Chemistry = study of matter.

Unit: ENERGY Topic 1: Types of Energy Energy = The ability to do work or produce heat Unit of energy = the Joule = J Two types: Potential Kinetic Lord.

Heat and Energy of Ractions Chapter 10 Energy World of Chemistry Zumdahl Last revision Fall 2009.

© 2014 Pearson Education, Inc. Thermochemistry Klein Forest High School-Chemistry Jarrod G Collins, M.Ed.

Energy!. Energy What do you feel like when you have no energy? What do you really not want to do? –Being lazy and doing no work! Energy: The ability to.

ENERGY n The ability to do work n remains constant in amount during a chemical or physical change n energy changes occur between the system and the surrounding.

Unit: Thermochemistry

CHEMISTRY Unit 11 Notes: Intro to Fire & Energy

Heat and Endothermic and Exothermic Reactions

Energy Changes in Reactions

The Nature of Energy 1.

Thermochemistry.

Jumpstart Get the note taking sheet from my front desk.

Unit: Thermochemistry

Thermochemistry.

Thermochemistry.

What is energy? Two types: Potential and Kinetic Page 2

Energy Changes in Reactions

7.3 Energy Changes In Reactions

Heating and Cooling Curve

Presentation transcript:

Chemistry—Chapter 2 ENERGY

What is ENERGY? (list types of energy) The ability to do WORK. What is WORK? The ability to move something, create a new compound or generate light.

Energy is neither Created nor Destroyed. Energy isn’t really lost or gained—it is TRANSFERRED to the System and its Surroundings.

What is the System? What is the Surroundings? Where is the energy transfer?

KvoVzukHo KvoVzukHo Movement of the molecules requires energy. So which state requires the most energy?

Chemical Changes Remember that changes of state are PHYSICAL changes, while CHEMICAL changes actually change the substance. In order for a CHEMICAL change to occur, there must be CONSERVATION of ENERGY. THE LAW of CONSERVATION of ENERGY states that “ENERGY is neither CREATED nor DESTROYED”.

Conservation of ENERGY When a Physical change happens, for example, a Phase change, energy is either absorbed or released. The same is true for a Chemical change. – If energy is released it is EXOTHERMIC – If energy is absorbed it is ENDOTHERMIC EXOTHERMIC—gets hot! ENDOTHERMIC—gets cold!

Remember to look at the SYSTEM and its SURROUNDINGS For example, when RUST happens (oxygen combines with iron), this is an Exothermic process, but if you walk outside and touch something rusty it doesn’t feel warm. WHY?

Why? The heat is given off to the ATMOSPHERE (the surroundings). It is very hard to detect a tiny increase in HEAT in a giant atmosphere. Its like adding a teaspoon of salt to a cup of water or an ocean. Would you detect the salt increase in the ocean?

One type of ENERGY is HEAT Heat is energy transferred from one object to another which makes molecules move. Heat always moves from a HOT object to a Cooler one. One cannot transfer COOLness. – Why do icecubes in a glass of water melt?

Exothermic Reactions Explosions are Rapid Releases of Heat. Energy can be stored (potential energy) as CHEMICAL ENERGY and released during a reaction as KINETIC ENERGY.

16w

Endothermic Reactions Ice Packs that get cold when you break them are ENDOTHERMIC—they absorb heat when a reaction inside the bag occurs.

uS7kMa0I

HEAT IS DIFFERENT than TEMPERATURE!! Temperature is the AVERAGE energy of molecules in a substance. Some molecules will have more energy and others less, but the AVERAGE is the temperature.

Changes of State

What is KELVIN ? Farhenheit Celsius Kelvin Water Boils Ice Melts “Absolute 0”

How to calculate Kelvin/Celsius Every degree Celsius can be converted to Kelvin by ADDING 273. – Example: 0 Celsius = 273 Kelvin Every degree Kelvin can be converted to Celsius by SUBTRACTING 273. – Example: 373 Kelvin = 100 Celsius