Aim: How does temperature affect the vapor pressure of liquids? Essential Questions: Why does vapor pressure increase as temperature increases? How is.

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Presentation transcript:

Aim: How does temperature affect the vapor pressure of liquids? Essential Questions: Why does vapor pressure increase as temperature increases? How is boiling point affected by intermolecular forces of attraction? Why are so many drops of water able to fit on the surface of a penny? Describe water’s forces of attraction.

Aim: How does temperature affect the vapor pressure of liquids? Essential Questions Why are pressure cookers a necessity for cooking foods at high altitudes? Cake mix recipes often state that at higher altitudes more time is needed to bake. Explain. Nail polish remover smells and feels cold, why? Can I make a nice, hot cup of coffee atop Mt. Everest? Explain.

Aim: How does temperature affect the vapor pressure of liquids? Vocabulary: evaporation- the process by which particles escape from the surface of a non-boiling liquid and enter the gas state. condensation- the process by which a gas changes to a liquid. H 2 o (g) H 2 o (l) vapor pressure- the pressure exerted by a vapor in equilibrium with its liquid state at a given temperature. H2oH2oH2oH2o

Aim: How does temperature affect the vapor pressure of liquids? Boiling point-The temperature at which the vapor pressure of a liquid equals the atmospheric pressure and boiling occurs. Normal boiling point- Boiling temperature when atmospheric pressure is 1 atm (standard temperature.) Refer to Table H and complete sentence below: As temperature increases, vapor pressure____________.

Aim: How does temperature affect the vapor pressure of liquids? GROUP TASK: Choose one of the demonstrations (manometer, vacuum, “evaporation race”), describe what you saw and generate a question. Graph data from do now. Determine how many drops of water can fit on the surface of a penny.