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Temperature

Temperature. Section1. Temperature Scales. Fahrenheit ( ◦ F ) Celsius ( ◦ C ) Kelvin ( K ). What temperature really is. Atoms are in constant motion, even in a solid object. The back-and-forth jiggling of atoms is caused by thermal energy , which is a kind of kinetic energy.

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Temperature

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  1. Temperature Section1

  2. Temperature Scales • Fahrenheit ( ◦F ) • Celsius (◦C ) • Kelvin ( K )

  3. What temperature really is • Atoms are in constant motion, even in a solid object. • The back-and-forth jiggling of atoms is caused by thermal energy, which is a kind of kinetic energy.

  4. Terms to Learn • Temperature: is a measure of the average kinetic energy of the particles in an object • Thermal expansion: is the increase in volume of a substance due to an increase in temperature. • Absolute zero: the lowest temperature on the Kelvin Scale

  5. Converting to Kelvin • The Kelvin temperature scale is useful in science because it starts at absolute zero. • To convert from Celsius to Kelvin, you add 273 to the temperature in Celsius. • Is the official SI temperature scale

  6. Absolute zero • Absolute zero is -273°C. • You cannot have a temperature lower than absolute zero. • Think of absolute zero as the temperature at which atoms are “frozen.”

  7. Fahrenheit • Measured in degrees • Water boils at….. • Water freezes at…..

  8. Celsius • Measured in degrees • Scale is divided into 100 equal parts between the freezing point and the boiling point • Water boils at….. • Water freezes at …..

  9. Temperature Conversions • Celsius to Fahrenheit • °F = (9/5 C) + 32 • Fahrenheit to Celsius • C = 5/9 (°F – 32)

  10. Solving Problems • A friend in Paris sends you a recipe for a cake. The French recipe says to bake the cake at a temperature of 200 °C for 45 minutes. • At what temperature should you set your oven, which uses the Fahrenheit scale?

  11. Solving Problems • Looking for: • …temperature in degrees Fahrenheit • Given: • …temperature 200 C • Relationships: • °F= (9/5 C)+ 32 • Solution • °F =(9/5(200 °C) + 32 = 392 °F

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