heat conversiontemperatures:. temperature scales fahrenheit celsius kelvin
TRANSCRIPT
![Page 1: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/1.jpg)
HEAT
ConversionTemperatures:
![Page 2: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/2.jpg)
Temperature Scales
Fahrenheit
Celsius
Kelvin
![Page 3: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/3.jpg)
Helpful Hints
Identify the equation needed. Plug in the numbers to solve Remember the math rules:
• Solve what is in parenthesis first• Solve Multiplication & Division before addition
and subtraction Show all work Put box around final answer
![Page 4: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/4.jpg)
Solving 2–Step temperature equations
Necessary only when converting: K to oF
oF to K
![Page 5: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/5.jpg)
Temperature Conversion Equations
4 equations to use: oF = 9/5oC + 32 oC = 5/9 (oF-32) K = oC + 273 oC = K – 273
![Page 6: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/6.jpg)
Convert 500 K to ____ o F
First convert K to o C– Use this equation: oC = K – 273
Then convert C to o F– Use this equation: oF = 9/5oC +
32
![Page 7: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/7.jpg)
Convert 500 K to ____ o F
Step 1:
oC = K – 273
oC = 500 – 273
oC = 227
Step 2:
oF = 9/5oC + 32 oF = 9/5(227) + 32 oF = 1.8(227)+ 32 oF = 408.6+ 32 oF = 440.60
![Page 8: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/8.jpg)
Convert 70 o F to ____ K
First convert o F to o CUse this equation: oC = 5/9 (oF-32)
Then convert C to KUse this equation: K = oC + 273
![Page 9: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/9.jpg)
Convert 70 o F to ____ K
Step 1:oC = 5/9 (oF-32)oC = 5/9 (o70-32)oC = 0.55 (38)oC = 2.11
Step 2:K = oC + 273K = 2.11 + 273K = 275.11
![Page 10: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/10.jpg)
Units of HeatObjectives are to: define and distinguish between various units of heat define the mechanical equivalent of heat discuss everyday examples to illustrate these
conceptsTemperature Conversions:
![Page 11: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/11.jpg)
Units of Heat
![Page 12: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/12.jpg)
Units of Heat Heat is energy in transit, and is measured in energy units. The SI unit is the joule (J), or Newton-metre (Nm). Historically, heat was measured in terms of the ability to
raise the temperature of water. The kilocalorie (kcal), or Calorie (Cal), or “big calorie”:
amount of heat needed to raise the temperature of 1 kilogramme of water by 1 C0 (from 14.50C to 15.50C)
The calorie, or “little calorie”: amount of heat needed to raise the temperature of 1 gramme of water by 1 C0 (from 14.50C to 15.50C)
In industry, the British thermal unit (Btu) is still used: amount of heat needed to raise the temperature of 1 lb of water by 1 F0 (from 630F to 640F)
![Page 13: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/13.jpg)
Mechanical Equivalent of Heat
Joule demonstrated that water can be heated by doing (mechanical) work, and showed that for every 4186 J of work done, the temperature of water rose by 1C0 per kg.
![Page 14: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/14.jpg)
Mechanical Equivalent of Heat
Conversion between different units of heat:
1 cal = 10-3 kcal = 3.969 x 10-3 Btu = 4.186 J
1 Cal = 1 kcal=4186 J
![Page 15: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/15.jpg)
Sensible Heat
Objectives are to: describe what is meant by 'sensible heat‘ define specific heat explain how the specific heat capacities of materials
are obtained using calorimetry
![Page 16: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/16.jpg)
Specific Heat Capacity
Sensible heat is associated with a temperature change (can be “sensed”)
Different substances have different molecular configurations and bonding temperature change not generally the same for equal amounts of heat
Specific heat capacity, c: amount of energy needed to raise the temperature of 1 kg of a substance by 1K
![Page 17: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/17.jpg)
Calorimeters
![Page 18: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/18.jpg)
Calorimeters (contd.)
![Page 19: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/19.jpg)
Calorimetry: An Exercise in Bookkeeping
![Page 20: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/20.jpg)
Calorimetry: Finding Specific Heats
![Page 21: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/21.jpg)
Calorimetry: Specific Heat
![Page 22: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/22.jpg)
Calorimetry: Mixtures
![Page 23: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/23.jpg)
Water: Specific Heat Capacities
and Latent Heats
![Page 24: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/24.jpg)
Water: Warming Curve
![Page 25: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/25.jpg)
Water: Example Problem
![Page 26: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/26.jpg)
Latent Heat
Objectives are to: Describe what is meant by ‘latent heat‘ Compare and contrast the 3 phases of matter Relate latent heat to phase changes
![Page 27: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/27.jpg)
Phases of Matter Heat required for phase changes:
– Vaporization: liquid vapour– Melting: liquid solid– Sublimation: solid vapour
Heat released by phase changes:– Condensation: vapour liquid– Fusion: liquid solid– Deposition: vapour solid
![Page 28: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/28.jpg)
Phases of Matter
![Page 29: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/29.jpg)
Latent Heat
![Page 30: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/30.jpg)
Phase Diagrams
![Page 31: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/31.jpg)
Phase Diagrams
Visual representation of phase changes Triple point: point at which all three
phases coexist Curves branching out from this point
separate phase regions:– Fusion curve: solid-liquid boundary– Vaporization curve: liquid-gas boundary– Sublimation curve: solid-gas boundary
![Page 32: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/32.jpg)
Phase Diagram: Water
![Page 33: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/33.jpg)
Phase Diagram: Carbon Dioxide
![Page 34: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/34.jpg)
Methods of Heat Transfer
Objectives are to: describe the three methods of heat transfer Give practical/environmental examples of each
![Page 35: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/35.jpg)
Thermal Conduction
Q TkA
t d
![Page 36: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/36.jpg)
Convection
![Page 37: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/37.jpg)
Radiation
Heat transfer by electromagnetic waves Does not need a material medium Black body: perfect absorber perfect
emitter (at all wavelengths)
4 4
4 4
r a env
net a r env
P A T P A T
P P P A T T
![Page 38: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/38.jpg)
Radiation
![Page 39: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/39.jpg)
Convection
![Page 40: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/40.jpg)
ConvectionatHome
![Page 41: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/41.jpg)
Convection
![Page 42: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/42.jpg)
Greenhouse Effect
![Page 43: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/43.jpg)
Greenhouse Effect
![Page 44: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/44.jpg)
Heat Transfer
![Page 45: HEAT ConversionTemperatures:. Temperature Scales Fahrenheit Celsius Kelvin](https://reader036.vdocuments.net/reader036/viewer/2022062320/56649d845503460f94a6bb44/html5/thumbnails/45.jpg)
Radiation