CHAPTER 22 AND 23

1. CHAPTER 22 AND 23 HEAT TRANSFER AND CHANGE OF PHASE

2. FLT : • Given heat transfer problems and questions , I will be able to define, compare and contrast • solid, liquid, gas and plasma • different processes of phase change • conduction , convection and radiation • high and low pressure • conductors and insulators • calculate heat absorbed and released during phase change and temperature change

3. HW p 351 Odd numbers Review Questions p 352 #21- 25, Think and Solve p353 - #37

4. Monday:Solid , Liquid and Gas Solid • Has definite shape • Has definite size or volume Liquid • No definite shape • Has definite size or volume Gas • No definite shape • No definite volume or size

6. Particles Inside Matter Write and share something about the following: Atoms Democritus and his ideas Dalton and his ideas about atoms Molecules Scanning Tunneling Microscope

7. Water Molecule (H2O)

8. Copper Molecules (Element)

9. Carbon Dioxide Molecule

10. Oxygen Gas Molecule(O2)

11. HW : Characteristic Properties • Hardness • Melting Point • Boiling Point • Color • Size • Shape • Shininess • Malleability • Ductility • Conductivity to heat and electricity

12. Boiling Points Water - 1000 C Ethyl Alcohol– 78C Mercury – 356.6 0C Melting Points Aluminum – 6600 C Lead - 327.40 C Gold - 10630 C Copper - 10860 C Iron - 15350 C Boiling Points and Melting Points

13. II. Vocabulary II • Solid • Crystalline Solid • Amorphous Solid • Liquid • Viscosity • Fluid • Gas • Volume • Temperature • Pressure

14. Amethyst is violet quartz crystal

15. Crystalline Solids

16. Salt Molecule

17. Amorphous Solid

18. Viscous LiquidsViscosity-

19. Water Molecule (H2O)

20. Alcohol C3H7OH

21. Viscous FluidThree-dimensional turbulent flow created by a wake vortex from a cropdusting aircraft. (Image is taken from NASA's Web site: http://www.nasa.gov.)

22. Fluids-

23. Gas

24. Carbon Dioxide Molecule

25. Physical Change Alters the form of a substance but does not change it to another substance Chemical Change Changes into a different substance with different properties Thursday:Physical & Chemical Changes

28. Energy Thermal Energy • Energy from the movement of its particles Chemical Energy • Energy from the chemical bonds of atoms within . Law of Conservation of Energy • Energy changes from one form to another but no energy is lost

30. Thermal Energy • Matter changes whenever energy is added or taken away • When something is heated , it gains thermal energy • When something is cooled , it loses thermal energy

31. Tuesday Temperature Conversion

32. Changes Between Liquid and Solid 1. Melting Heat is Absorbed - change in state from solid to liquid - melting occurs at a temperature called melting point SOLID LIQUID Ice -00C= 320F B. Freezing Heat is Released - the change of state from liquid to solid - reverse of melting - occurs at a temperature called freezing point LIQUID  SOLID Freezing Point of water= 00C=320F

33. Changes between Liquid and Gas 3. Vaporization Heat is absorbed Liquid gains enough energy to become gas Liquid  Gas 3a. Evaporation Vaporization that takes place on the surface of the liquid Ex. Ocean 3B. Boiling Vaporization that takes place inside a liquid Ex . Boiling water Boiling Pt of water = 1000C= 2120F

34. 4. Condensation Heat is released - gas loses thermal energy to become liquid Ex. Clouds form when water vapor condenses to water droplets suspended in air GAS  LIQUID Ex. Breath air onto a mirror ( cold surface) GAS  LIQUID

35. Changes Between Solid and Gas E. Sublimation Heat is absorbed - when the surface of a solid gains more energy to become gas . - Particles do not pass liquid state at all SOLID  GAS Ex. Solid air freshener ; dry ice(CO2)

37. CW:Conduction, Convection and Radiation p 325 Tree Map Definition, Drawing and Examples

39. Difference Conductors and Insulators p 337

41. Chapter 23 P339 – 347 By two’s a.Process b.Definition change from ____to _____ c.Kinetic energy ( increasing or decreasing) d. molecules are moving (less or more ) e. Temperature is hotter or colder Indicate Temperature points of water f. Atmospheric Pressure is low or high g. humidity is ( less or more) h. heat energy (released or absorbed )

43. Make a Flow chart for Refrigerator Cooling Cycle P 349 Identify Parts – and what’s happening on that part of the Refrigerator : Groups use paper charts

44. Vocabulary: Saturated Relative humidity Regelation

45. EQUATIONS: Q= mc AT Q= mL L= HEAT OF FUSION OR HEAT OF VAPORIZATION

46. L= Heat of fusion = The energy required to change a gram of a substance from the solid to the liquid state without changing its temperature is commonly called it's "heat of fusion".

47. Heat of vaporization the amount of heat required to convert unit mass of a liquid into the vapor without a change in temperature.

48. Questions p 348 Questions p 349

49. Copy The Charts : • A. specific heat • B. latent heat table

50. Specific Heat Capacity Table SubstanceSpecific Heat Capacity  at 25oC in J/goC H2 gas14.267 He gas5.300 H2O(l)4.184 lithium3.56 ethylalcohol2.460 ethyleneglycol2.200 ice @ 0oC2.010 steam @ 100oC2.010 vegetable oil2.000 sodium1.23 air1.020 magnesium1.020