1. Liquid Nitrogen Tank

2. Liquid nitrogen storage tank at Illinois State University.

3. Liquid Nitrogen (N 2 ) Physical properties: colorless liquid boiling point = -196 o C Uses: ‘flash’ freezing food (peas, fish) cosmetic surgery (removal of moles) size metal pieces cryogenic freezer for genetic samples (sperm, eggs) WARNING: Liquid nitrogen can cause severe burns. Mr. Bergmann demonstrates properties of liquid nitrogen.

4. Pressure Gauge for N 2 Note frozen water vapor on pipe (bottom left) of photo.

5. Liquid Nitrogen Freeze-dried flower (lyophylization) VIDEO Effect of temperature on volume of a gas VIDEO http://www.unit5.org/chemistry/GasLaws.html

6. Resources - Gas Laws Objectives WorksheetWorksheet - vocabulary Worksheet Video (VHS) - crisis in the atmosphere WorksheetWorksheet - behavior of gases Worksheet Worksheet - unit conversions for the gas laws Worksheet Worksheet - Graham's law Worksheet Worksheet - gas laws with one term constant Worksheet Worksheet - the combined gas law Worksheet Worksheet - Dalton's law of partial pressure Worksheet (general) Outline (general)general Outlinegeneral WorksheetWorksheet - density of gases (table) table Worksheettable WorksheetWorksheet - practice problems for gas laws Worksheet Worksheet - gas laws review / mole Worksheet Worksheet - review problems for gas laws Worksheet DemonstrationsDemonstrations - gas demos Demonstrations WorksheetWorksheet - manometers Worksheet Worksheet - vapor pressure and boiling Worksheet LabLab - reaction of Mg with HCl Lab WorksheetWorksheet - ideal gas law Worksheet ReviewReview – main points Review TextbookTextbook - questions Textbook Episode 17Episode 17 – The Precious Envelope

7. KEYS - Gas Laws Objectives WorksheetWorksheet - vocabulary vocabulary Worksheetvocabulary Video (VHS) - crisis in the atmosphere WorksheetWorksheet - behavior of gases Worksheet Worksheet - unit conversions for the gas laws unit conversions for the gas laws Worksheetunit conversions for the gas laws WorksheetWorksheet - Graham's law Graham's law WorksheetGraham's law WorksheetWorksheet - gas laws with one term constant gas laws with one term constant Worksheetgas laws with one term constant WorksheetWorksheet - the combined gas law the combined gas law Worksheetthe combined gas law WorksheetWorksheet - Dalton's law of partial pressure Dalton's law of partial pressure WorksheetDalton's law of partial pressure (general) Outline (general) Outline WorksheetWorksheet - density of gases (table) density of gasestable Worksheetdensity of gasestable WorksheetWorksheet - practice problems for gas laws Worksheet Worksheet - gas laws review / mole gas laws review / mole Worksheetgas laws review / mole WorksheetWorksheet - review problems for gas laws review problems for gas laws Worksheetreview problems for gas laws DemonstrationsDemonstrations - gas demos Demonstrations WorksheetWorksheet - manometers manometers Worksheetmanometers WorksheetWorksheet - vapor pressure and boiling vapor pressure and boiling Worksheetvapor pressure and boiling LabLab - reaction of Mg with HCl reaction of Mg with HCl Labreaction of Mg with HCl WorksheetWorksheet - ideal gas law ideal gas law Worksheetideal gas law ReviewReview – main points Review TextbookTextbook - questions questions Textbookquestions