Heat and Heat Transfer HeatTemperatureConductionConvectionRadiation

Temperature Hotness and coldness of a bodyHotness and coldness of a body Related to the kinetic energy of the moleculesRelated to the kinetic energy of the molecules

Heat Energy being transferred from one body to anotherEnergy being transferred from one body to another Internal EnergyInternal Energy Sum of potential and kinetic energies inside matterSum of potential and kinetic energies inside matter

Heat Transfer Heat energy flows from bodies with higher temperature to bodies with lower temperatureHeat energy flows from bodies with higher temperature to bodies with lower temperature Heat transfer occurs until both bodies have the same temperatureHeat transfer occurs until both bodies have the same temperature Thermal equilibriumThermal equilibrium

Heating does not always increase temperature. Change in the arrangement of particlesChange in the arrangement of particles Change of phaseChange of phase Potential energyPotential energy

Conduction Direct transfer of energy through vibration of atomsDirect transfer of energy through vibration of atoms Happens in solidsHappens in solids MechanismMechanism

Conductor Material that allows heat or energy to pass through it (or conduct.)Material that allows heat or energy to pass through it (or conduct.) Metals: very good conductorsMetals: very good conductors Good heat conductors are also good electrical conductors.Good heat conductors are also good electrical conductors.

Insulator Material that ________ heat to flow throughMaterial that ________ heat to flow through inhibit or does not allowinhibit or does not allow Conduct slowlyConduct slowly Examples:Examples: PlasticPlastic WoodWood RubberRubber

Convection Heat transfer by movement of particles or moleculesHeat transfer by movement of particles or molecules Fluids (liquids and Gases)Fluids (liquids and Gases) MechanismMechanism Convection currentConvection current ExamplesExamples

Thermal Radiation Heat transfer without use of a mediumHeat transfer without use of a medium Electromagnetic radiationElectromagnetic radiation Infra-red radiationInfra-red radiation MicrowaveMicrowave MechanismMechanism Emission of electromagnetic radiationEmission of electromagnetic radiation

Surfaces and Radiation Black SurfaceBlack Surface Good radiator, good absorberGood radiator, good absorber White surfaceWhite surface (Good reflector) bad absorber, bad radiator(Good reflector) bad absorber, bad radiator Silver SurfaceSilver Surface Very good reflector, bad absorberVery good reflector, bad absorber

Thermos Bottle or Vacuum Flask