© Edco 2010 Exploring Science Physics Heat and Heat transfer Learning outcomes In this section, you will learn: –The definition of heat, its units and.

Slides:

Advertisements

Similar presentations

Physical Science Chapter 6

Advertisements

Conduction CONDUCTION is when heat moves through a ________. Metals are better conductors of heat than plastic or wood. This is why… These parts are.

E(15-1) How is thermal energy transferred?

What do we all have in common?. What is the opposite of a conductor? Name a poor conductor of heat? What makes bubble wrap a bad conductor and a good.

How does Heat Energy transfer from one substance to another?

Energy Review Test Wednesday, May 2.

Chapter 6: Section 2 Temperature What is temperature?  Any ideas?  Think, pair, share (1min)

Big Idea 11: Energy Transfer and Transformations

Intro to Heat And Energy Transfer. Heat Heat is kinetic energy in a substance. Heat is the motion of the molecules in a substance, not the motion of the.

Chapter 5 TEMPERATURE AND HEAT Dr. Babar Ali.

Energy as Heat Transfer

Thermal Energy and Heat

Thermal Energy.

Thermal energy and Heat. Thermal energy Thermal energy is the total kinetic energy of all particles in a substance Measured in joules (J) This is not.

1 1 Temperature and Thermal Energy Temperature and energy Glencoe: Chapter 9 – Section 1: pages

HEATHEAT________ Heat is the transfer of thermal energy between objects. Heat always flows from warmer objects to cooler objects. Warm Thermal Energy Cool.

Heat Transfer & Phases Intro Chapter. Is the ability to do work and cause a change. Can be transferred. –Gases and liquids are made of molecules that.

Integrated Physics and Chemistry

Heat and States of Matter

Thermal Energy and Heat

Thermal Energy Heat.

Thermal Energy and Heat. Temperature The measure of how HOT or COLD and object is.

Thermal Energy. How does thermal energy work? Important terms to know:  Temperature:

Unit 2 Lesson 3 Thermal Energy and Heat

< BackNext >PreviewMain Section 1 Temperature What Is Temperature? Temperature is a measure of the average kinetic energy of the particles in an object.

Energy 7a. Designing a diagram, model or analogy to show or describe the motion of molecules for a material in a warmer and cooler state. 7b. Explaining.

Unit 6 : Part 3 Heat. Outline Definition and Units of Heat Specific Heat and Calorimetry Phase Changes and Latent Heat Heat Transfer.

Thermal Energy & Heat. Temperature Measure of how hot or cold something is compared to reference point Units: –Celsius –Fahrenheit –Kelvin.

Thermal Energy and Heat

Heat is a flow of energy due to temperature differences

Chapter 16 Heat 1. What is Heat Heat is the transfer of thermal energy from one object to another because of a temperature difference. Heat is the transfer.

Unit 2 Lesson 3 Thermal Energy and Heat

Temperature and Heat Transfer Food and Cooking Unit Mrs. Caldwell’s Class.

Temperature and Heat. Temperature Temperature is a measure of the average kinetic energy of the particles in an object. (how fast or slow the particles.

Thermal Energy & Heat Physical Science Chapter 6.

4.1- Temperature depends on particle movement The kinetic theory of matter helps explain the different states of matter- solid, liquid, and gas.

Heat, Temperature, and Internal Energy

Thermal Energy Intro Video.

Thermal Energy. Warm Up: To shape metal into a horseshoe, the metal is heated in a fire. Why will a horseshoe bend when it’s very hot, but not after it.

Ch Energy II. Thermal Energy  Temperature  Thermal Energy  Heat Transfer.

Chapter 6: Section 2 Temperature 2 things you need to know: 1.All things are made of atoms or particles that are too small to see.

Thermal Energy & Heat 1.Temperature – The measure of the average kinetic energy of the particles that make up a substance. 2.Temperature Scales – Fahrenheit,

How can heat be transferred?. Objectives Describe conduction as a method of heat transfer. Outcomes C: Define conduction. B: Explain conduction in terms.

Heat transfer. Why does heat transfer happen? Heat is a type of energy called thermal energy. Heat can be transferred (moved) by three main processes:

 Heat is thermal energy flowing from warmer to cooler objects.  Thermal energy: total energy of particles in matter.  Heat Energy is produced by the.

Topic 6 – Transferring Energy

Affects of Heating and Cooling Lesson 18. In our last lessons we learned that heat will always flow in one direction from hot to cold.

Particle Theory of Matter

Thermal Energy Transfer

5.2 Part 2 Heat Transfer.

Unit 5 Heat Energy Heat energy is the random movement of molecules

21/05/2018 Heating and Cooling.

Understanding Heat Transfer, Conduction, Convection and Radiation

Thermal Energy and Heat

Intro to Heat Mr. Oey.

Understanding Heat Transfer, Conduction, Convection and Radiation

EQ: What are three ways heat is transferred?

Thermal Energy Transfer

Thermal Energy Measurement related to the quantity of molecules.

Topic: Temperature and Heat

Heat Transfer Vocabulary

States of Matter and Heat

TEMPERATURE Measure of kinetic energy of molecules Thermometer

Heat and Temperature Chapter 13.

Presentation transcript:

© Edco 2010 Exploring Science Physics Heat and Heat transfer Learning outcomes In this section, you will learn: –The definition of heat, its units and the direction in which it flows. –The effect of heat on liquids, solids and gases. –The special behaviour of water when it cools. –The difference between heat and temperature. –The effect of pressure on the boiling point of water. –How heat is involved when a material changes state. –The shape of a cooling curve. –The three ways in which heat is transferred. –That some materials are insulators, others conductors.

© Edco 2010 Exploring Science Physics Heat: Its definition, units and direction Heat is a form of energy. So, heat is measured in joules. Heat always moves from a hotter object to a cooler one. A cup of coffee feels hot because heat is moving from the cup to your hand!

© Edco 2010 Exploring Science Physics The effect of heat on solids, liquids and gases Most solids, liquids and gases expand [get bigger] when heated and contract [get smaller] on cooling. In other words, the volume of most materials increases when you add heat and the volume decreases when you cool an object.

© Edco 2010 Exploring Science Physics The special case of water Water is an important example of a material that does not always expand on heating and does not always contract on cooling. Water at 0 0 C, when heated, contracts until it reaches 4 0 C. After this it behaves like other liquids. Water at 4 0 C, if cooled, expands until it reaches 0 0 C, then it starts contracting again. This means that ice floats on water in cold lakes and insulates the fish and plants below.

© Edco 2010 Exploring Science Physics Difference between heat and temperature Heat is a form of energy. Temperature is not. Temperature is a measure of the relative hotness or coldness of an object. Temperature is often measured relative to the freezing and boiling points of water.

© Edco 2010 Exploring Science Physics The effect of temperature on the boiling point of water When the pressure on a liquid changes, so does its boiling point. An increase in pressure raises the boiling point of water. In a pressure cooker, water can reach a temperature of more than C, cooking food faster.

© Edco 2010 Exploring Science Physics Heat and changes in state Matter is usually found in three states: solid, liquid or gas. When a material changes state, heat energy is taken in [absorbed] or given out [released]. The heat needed to change the state of a material is called the latent heat of the material.

© Edco 2010 Exploring Science Physics A cooling curve shows what happens to the temperature of an object when it cools. The flat parts of the graph indicate when the material is changing from gas to liquid and liquid to solid. Cooling curves and their shapes Temperature time

© Edco 2010 Exploring Science Physics The three ways in which heat is transferred Heat moves from one object to another in three ways: conduction, convection and radiation. Conduction is the transfer of heat without any overall movement of the substance. Convection is the movement of heat by the mass movement of particles. Radiation is the movement of heat by waves.

© Edco 2010 Exploring Science Physics Conductors and insulators Materials that transfer heat well are called conductors. Materials that do not transfer heat well are called insulators. Metals are good heat conductors and water, air and polystyrene are good heat insulators. They are good for keeping heat in.

© Edco 2010 Exploring Science Physics Summary: Key points Heat is a form of energy. Most solids, liquids and gases expand on heating and contract on cooling. Water expands on cooling between 4 0 C and 0 0 C Temperature is not the same as heat. Pressure affects the boiling point of a liquid. Increased pressure raises the boiling point of water.

© Edco 2010 Exploring Science Physics Summary (continued) Matter normally exists in three states: solid, liquid or gas. When a substance changes state it absorbs or releases heat. A cooling curve has flat sections, showing that energy is released upon changing state. Heat is transferred in three ways: conduction, convection and radiation. Materials that are good at transferring heat are called conductors. Poor conductors of heat are called insulators.