Tuesday April 14 Objective: Convert between celsius and kelvin. Checkpoint: – Define “temperature” in your own words. – What does it mean to be “hot” and.

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Presentation transcript:

Tuesday April 14 Objective: Convert between celsius and kelvin. Checkpoint: – Define “temperature” in your own words. – What does it mean to be “hot” and “cold” when talking about temperature? Homework: temperature conversions (due Wed/Thurs)

Thought of the Week

What was one highlight or nightmare over your spring break?

Stoichiometry Exam Re-take up to a 16.5 (until next Friday) A20-22 B18-19 C15-17 D13-14 F0-12

What is temperature? Take 30 seconds to come up with a definition for temperature. Spend 1 minute discussing your definition with your partner.

Temperature = molecular motion (average kinetic energy of molecules)

Temperature scales Water boils at 212 and freezes at 32 Water boils at 100 and freezes at 0 Add 273 to degrees Celsius

Temperature scales Water freezes at 0 What temp in Kelvin? Water boils at 100 What temp in Kelvin? Add 273!

Temperature scales Subtract 273! It will be 301 K in San Jose today. What will the temperature be in Celsius?

Temperature conversions homework –

Which has more volume?

What is volume? Take 30 seconds to come up with a definition for volume. Spend 1 minute discussing your definition with your partner.

What is keeping this balloon inflated?

What is pressure?

Units of pressure

751 torr  mm Hg 751 torr x torr mm Hg = mm Hg

0.95 atm  kPa 0.95 atm x atm kPa = kPa

635 mm Hg  atm 635 mmHg x mm Hg atm = atm

150 kPa  atm 150 kPa x kPa atm = atm

1.2 atm  torr 1.2 atm x atm torr = torr

Temperature conversions homework –