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Catalyst

Objectives: I can convert between Celsius and Kelvin temperature scales. I can explain what absolute zero is. Catalyst. On your handout, draw and describe the solid, liquid, and gas shown here. Agenda: Catalyst Notes & Practice: Gases and temperature Thermometers Reading Activity

ethan-beard
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Catalyst

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  1. Objectives: • I can convert between Celsius and Kelvin temperature scales. • I can explain what absolute zero is. Catalyst On your handout, draw and describe the solid, liquid, and gas shown here • Agenda: • Catalyst • Notes & Practice: Gases and temperature • Thermometers Reading Activity • Exit Slip: Temperature

  2. I can convert between Celsius and Kelvin temperature scales. I can explain that there is no temperature lower than 0 degrees Kelvin (absolute zero). Objectives:

  3. 30 sec to think, then talk with the person next to you… be ready to share with the class: Our new unit is gases. What is a gas? How are gases similar or different from liquids or solids? think Pair Share

  4. Gases Notes 1: Introduction and Vocabulary

  5. Characteristics of Gases • The distance between gas particles is much greater thanthe distance between particles of a liquid or solid. • Applying pressureto a gas compresses or pushes the particles closer together. • Unlike solids and liquids, gases completelyfill their containers. • Gases have high kinetic energy because their particles move more than particles in a solid or liquid. • Gases do have mass. (We measured the mass of carbon dioxide in the baking soda/vinegar lab.)

  6. kinetic energy: the energy of an object that is due to the object’s motion. • Energy of motion How do we measure gas properties? • temperature: a measure of the average kinetic energy of the particles in an object. • How much kinetic energy the molecules have

  7. volume: a measure of the size of an object in three dimensional space. • How much space the molecules are filling up • pressure: the amount of force exerted per unit area on a surface. • How much the molecules are pushing on a surface How do we measure gas properties?

  8. Today’s Focus: Temperature In chemistry we use two temperature scales: Celsius and Kelvin

  9. The formula K = oC + 273 • Example: convert 33oC to Kelvin: K = 33oC + 273 = 306K • Example: convert 202K to Celsius: 202K = oC + 273 202K - 273 = -71oC • Convert these temperatures to Kelvin • 23oC 100oC -173oC • Convert these temperatures to Celsius • 0K 123K 300K Celsius & Kelvin Conversions

  10. K = oC + 273 • Convert these temperatures to Kelvin • 23oC 100oC -173oC • Convert these temperatures to Celsius • 0K 123K 300K Celsius & Kelvin Conversions

  11. Complete the practice problems at the bottom of your notes. Get a stamp when you are done. Practice:

  12. Reading Activity: Thermometers Article • Read the article about thermometers and answer the reading focus questions on your own sheet of paper. (Standards 4e, 4f, and writing) • You may work quietly with a partner. • When you are done, check the answer key and try the extra practice problems on your worksheet. Reading Activity

  13. Bring a 2 Liter bottle!!! Homework

  14. If you did not finish the article questions, it is due tomorrow. The article is posted on the class website. Read Textbook pp. 43-45 Do problems pp. 45 #6, 7, 8, 12. (Videos and other resources posted on class website.) Optional: Make Flashcards: temperature, pressure, volume, kinetic energy, celsius, Kelvin, absolute zero, solid, liquid, gas Homework

  15. What is temperature? • Temperature is a measure of the average kinetic energy of particles in an object. • Are there negative Kelvin temperatures? Why or why not? • There are no negative Kelvin temperatures because 0K is absolute zero. That is the lowest possible temperature because it is the temperature at which all molecular motion stops. • Convert the following: 0oC = _____K 273K 1500oC = ____K 1773K 1200K = _____ oC 927oC 100K = _____ oC --- - 173oC Exit Slip Answers (Standard 4e & 4f)

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