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Temperature Conversions

Temperature Conversions. Temperature. Particles are always moving. When you heat water, the water molecules move faster. When molecules move faster, the substance gets hotter. When a substance gets hotter, its temperature goes up. Temperature. Temperature

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Temperature Conversions

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  1. Temperature Conversions

  2. Temperature • Particles are always moving. • When you heat water, the water molecules move faster. • When molecules move faster, the substance gets hotter. • When a substance gets hotter, its temperature goes up.

  3. Temperature Temperature • is a measure of how hot or cold an object is compared to another object. • indicates that heat flows from the object with a higher temperature to the object with a lower temperature. • is measured using a thermometer that contains a liquid that expands with heat and contracts with cooling..

  4. Temperature Scales Temperature Scales • Are • have reference points for the boiling and freezing points of water.

  5. Learning Check A. What is the temperature of freezing water? 1) 0°F 2) 0°C 3) 0 K B. What is the temperature of boiling water? 1) 100°F 2) 32°F 3) 373 K C. How many Celsius units are between the boiling and freezing points of water? 1) 100 2) 180 3) 273

  6. Fahrenheit Formula • On the , there are 180°F between the freezing and boiling points and on the , there are 100°C. 180°F = 9°F = 1.8°F 100°C 5°C 1°C • In the formula for the , adding 32 adjusts the zero point of water from 0°C to 32°F. TF = 9/5 TC + 32 or TF = 1.8 TC + 32

  7. Celsius Formula • TC is obtained by rearranging the equation for TF. TF = 1.8TC + 32 • Subtract 32 from both sides. TF - 32 = 1.8TC ( +32 - 32) TF - 32 = 1.8TC • Divide by 1.8 = °F - 32 = 1.8 TC 1.8 1.8 TF - 32 = TC 1.8

  8. Solving A Temperature Problem A person with hypothermia has a body temperature of 34.8°C. What is that temperature in °F? TF = 1.8 TC + 32 TF = 1.8 (34.8°C) + 32° exact tenth's exact = 62.6 + 32° = 94.6°F tenth’s

  9. Learning Check The normal temperature of a chickadee is 105.8°F. What is that temperature on the Celsius scale? 1) 73.8°C 2) 58.8°C 3) 41.0°C

  10. Learning Check A pepperoni pizza is baked at 455°F. What temperature is needed on the Celsius scale? 1) 423°C 2) 235°C 3) 221°C

  11. Learning Check On a cold winter day, the temperature is –15°C. What is that temperature in °F? 1) 19°F 2) 59°F 3) 5°F

  12. Kelvin Temperature Scale The • has 100 units between the freezing and boiling points of water. 100 K = or 1 K = • is obtained by adding 273 to the Celsius temperature. TK = • contains the lowest possible temperature, absolute zero (0 K). 0 K =

  13. Temperatures

  14. Learning Check What is normal body temperature of 37°C in Kelvins? 1) 236 K 2) 310. K 3) 342 K

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