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Label the Phase changes on the diagram: 1 Vaporization/Boiling 2 Condensation 3 Melting

Label the Phase changes on the diagram: 1 Vaporization/Boiling 2 Condensation 3 Melting 4 Freezing 5 Sublimation 6 Deposition. Significant Figures and Specific Heat Calculations. WARM UP: Turn to page 18 in your workbook and answer the warm-up question at the top of the page.

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Label the Phase changes on the diagram: 1 Vaporization/Boiling 2 Condensation 3 Melting

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  1. Label the Phase changes on the diagram: 1 Vaporization/Boiling 2 Condensation 3 Melting 4 Freezing 5 Sublimation 6 Deposition

  2. Significant Figures and Specific Heat Calculations WARM UP: Turn to page 18 in your workbook and answer the warm-up question at the top of the page. Now Turn back to page 15 in your notes!

  3. Add this 6th Rule to your notes about Scientific Notation! 6. For values in scientific notation, only digits in the coefficient (base #) are significant 1.20 x 1021 ________ 5.00 x 10-15 ______ 6.02 x 1023 ______

  4. When Rounding Significant Figures: • Determine how many significant figures you HAVE? • How many do you WANT? • Circle the significant figure you will be rounding. • Underline the sig fig right after it. • 0 – 4 = stays the SAME while 5 - 9 = rounding UP. Example: Round 25.052 to 3 significant figures HAVE? = WANT? = Circle the sig figs you will round Underline the sig fig after it Round: in this case, the 5 rounds the 0 up to a 1. New answer = 25.1

  5. Complete the rest of page 18 for homework!!!

  6. Turn to Page 20 and prepare to take notes.

  7. What we know so far…Low Motion = Low TemperatureHigh Motion = High Temperature

  8. Motion requires EnergyHigher Energy = Higher Temp.USUALLY energy is supplied by heat.

  9. Law of Conservation:Heat loss or gain = Energy loss or gain Heat lost from hand = Heat gained by ice

  10. By how much will the temperature of an object increase or decrease by gaining or losing heat energy?This is given by Specific Heat! Which substance has a greater specific heat? This means it takes longer to gain or lose heat!!

  11. Specific Heat is the amount of heat needed to increase the temperature of 1g of a substance by exactly 1oC

  12. Specific Heat = cpcp =__q__ m(ΔT)ORq = mcpΔT

  13. q = C m(ΔT)q = heat in joules (J) or calories (cal)cp = specific heat (J/goC or cal/goC)m = mass in grams (g)ΔT = change in temperature (oC)“To” - “From”

  14. Now let’s try a problem…Look at the bottom of page 18 in your packet.

  15. Now let’s try a problem…

  16. Homework: Page 21 in your packet!

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