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Please Put Away

Please Put Away. Electronic Devices. In the Classroom. Temperature. Temperature is a measure of how hot or cold something is using a thermometer. There are four types of temperature scales:. Celsius. Metric = ________. Kelvin. SI = ________. Commonly used in US for weather.

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Please Put Away

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  1. Please Put Away Electronic Devices In the Classroom

  2. Temperature Temperature is a measure of how hot or cold something is using a thermometer There are four types of temperature scales: Celsius • Metric = ________ Kelvin • SI = ________ Commonly used in US for weather Fahrenheit Rankine • English = ________ and _________ Used in aerospace industry. (English equivalent to Kelvin scale)

  3. The most common thermometer used in labs is the Celsiusthermometer. The Kelvin scale is based on the concept of AbsoluteZero. Absolute zero (0 Kelvin) is the coldest possible temperature.

  4. Converting Temperature: Celsius to Kelvin: K = °C + 273 Kelvin to Celsius: °C = K - 273 Kelvin is 273 greater than Celsius. Kelvin temperatures will always be positive numbers

  5. Converting Temperature: Celsius to Kelvin: K = °C + 273 Kelvin to Celsius: °C = K - 273 The size of the Kelvin and Celsius degree are the same. Freezing water to boiling water: 0 °C to 100 °C or 273 K to 373 K Both are 100 degree difference The size the Fahrenheit degree is smaller than the size of the Kelvin or Celsius degree. Freezing water to boiling water: 0 °C to 100 °C or 32 ° F to 212 ° F 212 – 32 = 180 A 100 degree difference for Celsius. A 180 degree difference for Fahrenheit. A change of 1 °C = 1.8 ° F

  6. Converting the following temperatures: Celsius to Kelvin: K = °C + 273 Kelvin to Celsius: °C = K - 273 Kelvin is 273 greater than Celsius. Freezing point of water Normal room temperature 273 298 0°C = ________ K 25°C = ________ K K = °C + 273 K = °C + 273 K = 25 + 273 K = 0 + 273 K = 298 K K = 273 K

  7. Converting the following temperatures: Celsius to Kelvin: K = °C + 273 Kelvin to Celsius: °C = K - 273 Kelvin is 273 greater than Celsius. Human body temperature A warm fall day 310 27 37°C = _______ K 300 K = _______ °C °C = K - 273 K = °C + 273 °C = 300 - 273 K = 37 + 273 °C = 27 °C K = 310 K

  8. Comparing all four temperature scales. Boiling point for water 373 K 671.4 °R 100 °C 212 °F Normal Human body temp. 310 K 558 °R 37 °C 98.6 °F Freezing point for water 273 K 491.4 °R 0 °C 32 °F Absolute zero 0 K 0 °R - 273.15 °C - 459.4 °F

  9. Ch. 4 (Unit Conversions) Factor-Label Method

  10. Factor-Label Method 1. _______ lb. = 235 g 454 g = 1 lb. 454 1 lb. 235 g = lb. 0.5176 0.518 X g

  11. Factor-Label Method 2. _______ in. = 16.0 ft. 12 in. = 1 ft. 12 1 in. 16.0 ft. = in. 192 192 X ft.

  12. Factor-Label Method 3. _______ L = 18.0 gal 1 gal = 3.78 L 1 3.78 L 18.0 gal = L 68.04 68.0 X gal

  13. Factor-Label Method 4. _______ ft = 400 m 1 m = 3.28 ft 1 3.28 ft. 400 m = ft 1312 1000 X m 1 significant figure

  14. Conversion Factors 5. _______ miles = 5 km = 1000 m 1000 m 1 km 1 km 5,280 ft 5,280 ft 1 mile 1 mile = = 3.28 ft 1 m 3.28 ft 1 m 5 km = mi. 3 3.106 X X X On Calculator: 5 x 1000 x 3.28 ÷ 5280 = 3.106060606

  15. Law of Conservation of Matter: Matter is neither created nor destroyed during ordinary chemical change. Reactants Products  Total mass of reactants Total mass of products =

  16. Chemistry Interactive Review: Internet practice: http://www.sciencegeek.net/Chemistry/taters/directory.shtml As a lab group complete the following: Counting significant figures Significant figure practice Complete activity as many times as possible to get 75 % or higher. Show the teacher your result and it will be the grade for every person in the group.

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