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Modified over 4 years ago
Chapter 10 Heat and Temperature
Temperature Page 324 Temperature is proportional to the average kinetic energy of an object
Measuring Temp Thermometers –Page 325 Based on the principle that most objects expand when their temperature increases
Measuring Temp Common Scales –Celsius –Fahrenheit –Kelvin – absolute zero
Energy Transfer Always from higher temp to lower temp Heat – page 330
Dr. Carlson Dr. Carlson Thermodynamics Dr. Carlson
Methods of Energy Transfer 3 ways –Conduction –Convection –Radiation
Conduction Page 332 Involves objects in direct contact Example: metal fork that holds marshmallow
Convection Page 332 Movement of warm fluids – liquid or gas Convection Current Example: warm air around the campfire
Radiation Page 333 Does not require physical contact between objects Example: heat you feel when you stand near the campfire
Conductor Page 334 What makes a good conductor? Metals better than non- metals
Insulators Page 335 Slow transfer of energy as heat Example: –wooden spoon
Specific Heat Page 336 Characteristic physical property Ratio can be used to predict larger changes for masses other than 1 kg
Using Heat Machines can transfer energy as heat from one place to another Examples? –Air Con, Fridge,
Using Heat Conservation of Energy Energy moves from high temp to lower temp
Air Conditioner Removes energy as heat from the warm air Transfers energy to air outside the room
Cooling System Page 343 Often use evaporation and condensation Refrigerant – page 344
Cooling System Liquid – Gas - Liquid Changes of state always transfer lots of energy
Heating Systems Page 340 Transfers heat from outside to inside Need a source of energy
Heating Systems Furnace or solar energy can be used to heat air or water solar Which can be pumped through a building to transfer energy and increase temperature
Usable Energy Some is lost through conduction and radiation Usable energy decreases Insulation can decrease loss
2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Why are you So Heated Stick a Fork.
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