Chapter (1/2)(Twelve) & Thirteen T EMPERATURE & H EAT T RANSFER.

Slides:

Advertisements

Similar presentations

Thermal Physics.

Advertisements

CONVECTION CURRENTS AND THE MANTLE

Thermal Energy… More Energy??? Yes, More Energy. Its getting hot in herre… All matter is made up of moving particles and has kinetic energy. Kinetic Energy.

Heat Chapter 9 &10. Kinetic-molecular Theory Matter is made up of many tiny particles that are always in motion In a hot body the particles move faster.

Main Points All matter is made up of invisible particles Particles have spaces between them Particles are moving all the time Particles move faster when.

Thermal Energy Transfers

Energy, Heat and Heat Transfer

Transferring Thermal Energy Chapter 9 Section 3a.

Chapter 14.2 – Energy Transfer

C HAPTER 2; S ECTION 2 Heat transfer. T HINK ABOUT IT … If you add ice to lemonade on a hot summer’s day why does the ice melt? Choose the best answer:

Chapter 2; Section 2 Atmospheric Heating

Heat and Energy Chapter 3 section 2

Thermal Energy Heat.

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

Chapter 5 Lecture Concepts in Science Thermal energy vs temperature Thermal Energy: the sum of kinetic energy and potential energy of all the.

Unit 3 Lesson 3 Energy Transfer

TEMPERATURE AND HEAT Thermal Energy. T EMPERATURE VS. H EAT What is the difference between temperature and heat?

Thermal Energy. Thermal Energy vs. Temperature TEMPERATURE: Measure of the AVERAGE kinetic energy in the particles of a substance. – how fast the particles.

Thermal Energy & Heat Transfer Advanced Physical Science.

10.1 Temperature, Thermal Energy, and Heat The kinetic molecular theory explains that all matter is made up of tiny particles.  These atoms and molecules.

Energy Transfer.

Thermal Energy and Heat thermal energy the total kinetic and potential energy of the atoms or molecules of a substance heat the transfer of energy from.

C HAPTER 2; S ECTION 2 A TMOSPHERIC H EATING Heat transfer.

A TMOSPHERIC H EATING Heat transfer. R ADIATION : S OLAR E NERGY T RANSFERS BY W AVES Radiation: is energy that is transferred as electromagnetic waves,

UNDERSTANDING HEAT TRANSFER: CONDUCTION, CONVECTION AND RADIATION.

Moving Thermal Energy. CONDUCTION ► Is the transfer of energy through matter by direct contact of particles.

Heat Transfer Thermal energy Temperature is the average amount of energy of motion of each particle of a substance. Thermal energy is the total energy.

Heat and Thermal Energy Sources 14 Key Ideas Thermal energy influences temperature, density, pressure, and a substance’s physical state. Thermal energy.

@earthscience92. What is Energy? Energy – Is the ability to cause change – Many forms of energy – Two general forms of energy are Kinetic energy Potential.

Heat Transfer Unit 3 Lesson 1 Pages Unit 3 Lesson 1 Pages

Conduction, Convection, Radiation Chapter 6, Lesson 2.

Convection Currents Heat is always transferred from warmer substance to a cooler substance. Write down some examples of this concept:

 The measure of the average kinetic energy of particles. Temperature doesn’t depend on the number of particles.

Thermal Energy That’s so hot.. All matter is made of tiny little particles (atoms and molecules) All matter is made of tiny little particles (atoms and.

Chapter 5 – Thermal Energy and Heat 5.1 Temperature, Thermal Energy, and Heat.

Heat and Energy Chapter 3 section 2 Key Concept: Heat flows in a predictable way from warmer objects to cooler objects until all the objects are the same.

Unit 3 Lesson 2 Energy Transfer

Thermal Energy Transfer

Thermal Energy & Heat.

5.2 Part 2 Heat Transfer.

Heat and Energy Chapter 3 section 2

Unit 3 Lesson 2 Energy Transfer

Temperature and Heat Transfer

Understanding Heat Transfer, Conduction, Convection and Radiation

II. Thermal Energy Temperature Thermal Energy Heat Transfer

Thermal Energy & Heat Transfer

Thermal Energy Transfer

Heat Transfer and Molecular Motion

Topic: Temperature and Heat

Heat = Transfer of energy between objects that are at different temperatures Goes from the HIGHER temp. object to the LOWER temp. object.

Essential Question: How does energy change from one form to another?

Heat Warmth and Coldness.

Heat Transfer and Molecular Motion

Unit 3 - Energy Learning Target 3.4 – Define Temperature and explain how thermal energy is transferred (conduction, convection, & radiation)

Energy & Transformations

Heat Transfer and Molecular Motion

Temperature Is a property of an object which determines the direction of net heat flow when an object is placed in contact with some other object. Heat.

Convection Currents and the Mantle

Unit 3 Lesson 2 Energy Transfer

Thermal Energy and Heat!

Write down some examples of this concept:

The Transfer of Heat Chapter 13.

Notes 6: Transferring Thermal Energy

Thermal Energy.

Matter in Motion - all thing are made of tiny particles (atoms)

Presentation transcript:

Chapter (1/2)(Twelve) & Thirteen T EMPERATURE & H EAT T RANSFER

T EMPERATURE : Average kinetic energy of particles Adding energy to a substance…  Particles move faster  Temperature rises T EMPERATURE : Average kinetic energy of particles Adding energy to a substance…

T EMPERATURE : Average kinetic energy of particles H EAT : (Q) Energy transferred between objects because of a difference in temperature T EMPERATURE : Average kinetic energy of particles H EAT : (Q) Energy transferred between objects because of a difference in temperature  Measured in joules: (J) T EMPERATURE : Average kinetic energy of particles H EAT : (Q) Energy transferred between objects because of a difference in temperature  Measured in joules: (J)  Originates from the I NTERNAL E NERGY of the hot object  I NTERNAL E NERGY : (U) = KE + PE + etc.

H EAT T RANSFER :

C ONDUCTION Dependent on the material Thermal Conductivity (k) Heat is directly transferred THROUGH a material Particle collisions

C ONVECTION Heat is transferred by the movement of a fluid – Natural vs. Forced convection “Warm air rises and cool air sinks… ” Natural: Temperature differences are strong enough for a convection current Forced: External device used to mix cooler and warmer fluids (Fan or Pump)

R ADIATION Energy is transferred by electromagnetic waves Matter is not required -Dependent on the emissivity (e) of the surface -Stefan Boltzmann constant: 5.67×10 -8 J/(s  m 2  K 4 )

E XAMPLE P ROBLEM Clumsy Miss DeBoer owns a heavy duty curling iron that curls at a temperature of 148° C. The iron is 20.0 cm long with a radius of 1.0 cm. Find the amount of heat conducted from one end of the iron to her arm in 0.50 s. - Thermal conductivity of iron is 79 J/s  m  C° -Body temperature is 37° C.

(79 J/s  m  C° ) [π(0.010 m ) 2 ] (1 48° C- 37 ° C) (0.50 s ) 0.20 m k = 79 J/s  m  C° r = 1.0 cm T iron = 1 48° C T arm = 37° C t = 0.50 s L= 20.0 cm Q= 6.9 J

T HERMAL E XPANSION L INEAR T HERMAL E XPANSION : If the temperature of a solid increases, its length also increases V OLUMETRIC T HERMAL E XPANSION : If the temperature of a solid increases, its volume also increases

T HERMAL E QUILIBRIUM Hot and cold objects are in contact with each other… …Energy will transfer until they are the same temperature. NET transfer is zero