Distillation Theory...Kinetic Theory States of Matter Phase Change Distillation & Pressure H 2 O &...

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Transcript of Distillation Theory...Kinetic Theory States of Matter Phase Change Distillation & Pressure H 2 O &...

Page 1: Distillation Theory...Kinetic Theory States of Matter Phase Change Distillation & Pressure H 2 O & D=M/V 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400
Page 2: Distillation Theory...Kinetic Theory States of Matter Phase Change Distillation & Pressure H 2 O & D=M/V 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400

Kinetic Theory

States of Matter

Phase Change

Distillation & Pressure

H2O & D=M/V

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Question 1 - 100

• When heated an increase in the kinetic energy of a substance causes the particles to

a. move ______________,

b. collide more ______________ with one another which then

c. causes volume to ______________.

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Answer 1 – 100

a. move faster

b. collide more frequently

c. volume increases

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Question 1 - 200

• In the solid state of matter, the kinetic energyof the particles composing the substance is _________.

• The forces of attraction hold the particles in ____________.

• Therefore, a solid has a __________ shape ___________ volume.

1min

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Answer 1 – 200

• In the solid state of matter, the kinetic energyof the particles composing the substance is low.

• The forces of attraction hold the particles in fixed positions.

• Therefore, a solid has a definite shape definite volume.

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Question 1 - 300

• According to the Kinetic Molecular Theory of Matter, the state or phase of a substance is determined by the interaction of two opposing influences. What are they?

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Answer 1 – 300

• Kinetic Energy and Forces of Attraction

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Question 1 - 400

In the liquid state of a substance, the kinetic energy of the particles is _________.

Collisions between particles prevent

_______ of __________ from holding them in fixed positions. Particles are free to move about relative to one another. Liquids have a __________ volume, and __________ shape.

1min

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Answer 1 – 400

In the liquid state of a substance, the kinetic energy of the particles is moderate.

Collisions between particles prevent

forces of attraction from holding them in fixed positions. Particles are free to move about relative to one another. Liquids have a definitevolume, and indefinite shape.

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Question 1 - 500

• In the gas state of a substance, the kinetic energy of the particles is ______. The collisions between the particles are high energy causing them to fly apart. Forces of attraction are _____ or ___________overcome all together. Therefore a gas has __________volume and __________shape.

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Answer 1 – 500

• In the gas state of a substance, the kinetic energy of the particles is high. The collisions between the particles are high energy causing them to fly apart. Forces of attraction are weak or completelyovercome all together. Therefore a gas has indefinite volume and indefiniteshape.

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Question 2 - 100

• _________ A measure of the average kinetic energy of the particles making up a sample of matter.

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Answer 2 – 100

• Temperature A measure of the average kinetic energy of the particles making up a sample of matter.

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Question 2 - 200

• ____________ Particles in a gas move at different speeds and in many different directions. The forces of attraction are weak and kinetic energy is strong as particles collide and rebound off one another constantly. However, if the temperature is decreased and the substance can cool, while having a surface to settle on, this phase change can occur.

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Answer 2 – 200 • Condensation

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Question 2 - 300

• ____________ Molecules in a liquid have several forces influencing them. In addition to atomic forces of attraction, atmospheric pressure and gravity often pin them in place and resist this phase change from occurring. Despite these forces, some particles at the surface may gain just enough kinetic energy to overcome the forces of attraction that keep them together in the liquid state.

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Answer 2 – 300 • Evaporate Molecules in a liquid have several

forces influencing them. In addition to atomic forces of attraction, atmospheric pressure and gravity often pin them in place and resist this phase change from occurring. Despite these forces, some particles at the surface may gain just enough kinetic energy to overcome the forces of attraction that keep them together in the liquid state.

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Question 2 - 400• As the average energy (temperature) of particles

decreases, the space between the particles does this _____________.

This can occur to any of the states of matter; solids liquids or gases. Increasing pressure has this effect on gases in particular as well.

This is called _______________.

Give a class example of a solid doing this __________

Give a class example of a liquid doing this __________

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Answer 2 – 400 • As the average energy (temperature) of particles

decreases, the space between the particles does this decreases.

This can occur to any of the states of matter; solids liquids or gases. Increasing pressure has this effect on gases in particular as well.

This is called contraction.

Give a class example of a solid doing this ring and ball

Give an example of a liquid doing this thermometer

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Question 2 - 500

Regardless of the state of matter; solid, liquid or gas, the forces of attraction between the particles that make it up are a _________.

What factor is it that ultimately

determines the state of matter?

___________.

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Answer 2 – 500

Regardless of the state of matter; solid, liquid or gas, the forces of attraction between the particles that make it up are a constant.

What factor is it that ultimately

determines the state of matter?

Kinetic Energy

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Question 3 - 100

• ____________ As a solid is heated, the kinetic energy of its particles increases. The particles vibrate faster and faster until the forces of attraction can no longer hold on. Forces of attraction are weakened and molecules start to move freely around one another.

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Answer 3 – 100

• Melting As a solid is heated, the kinetic energy of its particles increases. The particles vibrate faster and faster until the forces of attraction can no longer hold on. Forces of attraction are weakened and molecules start to move freely around one another.

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Question 3 - 200

• __________ As the temperature of a liquid decreases, the kinetic energy of its particles decreases. The slower moving particles collide off each over with less and less frequency. Forces of attraction start to overcome motion and particles, become fixed in their relative positions.

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Answer 3 – 200

• Freezing As the temperature of a liquid decreases, the kinetic energy of its particles decreases. The slower moving particles collide off each over with less and less frequency. Forces of attraction start to overcome motion and particles, become fixed in their relative positions.

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Question 3 – 300 see next slide

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Answer 3 – 300

• Describe the energy requirements to change H2O from a solid to a liquid, verses changing the same quantity from a liquid to a gas.

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Question 3 – 400 Describe the phase change properties of substance B in respect to substance A.

Substance A

Substance B

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Answer 3 – 400

Substance B has a lower melting/freezing pt and higher boiling/ condensation pt.

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Question 3 – 500 Sketch the graph of sublimation on top. Label states and phase change

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Answer 3 – 500

Substance A

Substance B

Sublimate

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Question 4 - 100• What is the name given to the vapor

compression distiller, the device designed by Dean Kamen and his team we learned about in class?

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Answer 4 – 100

• The Sling Shot

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Question 4 - 200

• What two phase changes of matter does a distillation apparatus take advantage of?

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Answer 4 – 200 • Boiling and Condensing

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Question 4 - 300

• What two variables can we manipulate and how in the distilling flask to improve efficiency of distillation?

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Answer 4 – 300

• Increase temperature

• Decrease pressure

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Question 4 - 400• What can be done in the condenser to

improve productivity and thus increasing distillate produced?

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Answer 4 – 400

• Decrease temperature

• Increase pressure

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Question 4 - 500• The process of distillation is beneficial for

producing many products by taking advantage of their physical properties of phase change at various temperature.

• What are three products produced in this manner?

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Answer 4 – 500 • Potable water,

• alcohol,

• methane, gasoline, propane,

• purified solvents….

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Question 5 - 100• What is a force of attraction unique to

water?

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Answer 5 – 100

• Cohesion

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Question 5 - 200

• Which end of a water molecule isc negative and which end is positive?

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Answer 5 – 200

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Question 5 - 300

This happens to water as it changes states from liquid to solid. Describe volume and density.

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Answer 5 – 300 • Density decreases and volume increases

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Question 5 - 400• Surfactants have the effect of making

water “wetter” and washing away dirt and debris, because of possessing both these paradoxical properties at once.

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Answer 5 – 400 • Hydrophobic tail and hydrophilic tail

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Question 5 - 500• Engineers need to known what a new polymer

they are designing will do in water?

Sink, float, or remain neutrally buoyant

The substance has a mass of 100 grams and a volume of 120 cm3.

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Answer 5 – 500 • D > 1 sink ex: 1.5 g/cm3

• D < 1 float ex: 0.8333 g/cm3

• D = 1 neutrally buoyant ex: 1 g/cm3


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