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Temperature Conversions

Learn about temperature conversions between Celsius, Fahrenheit, and Kelvin scales. Understand how temperature affects the movement of particles and how to convert temperatures using specific formulas. Test your knowledge with interactive learning checks.

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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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