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Q2: week 1 – 11/14 – 11/18

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 ” The first day of class should connect to the last day and every day in between!”
 
                                           Please check Power School for accuracy! 
 
I WILL NOT ACCEPT HOMEWORK AFTER 5:00 am the following day.  IF THERE IS A Problem YOU NEED TO EMAIL ME. IF YOU DO NOT and you do not complete your homework on time YOU WILL EARN A ZERO!          
                                                                                                   
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 _________________________________________                                                                                              Jump to:  Monday Homework 

11/14 – Monday “B” Day  

Main focus: 

1. To Define vapor pressure, boiling, and normal boiling

2. To identify the variables the affect boiling. 
3. To utilize table H to solve vapor pressure questions
4. To Identify the relationship with Vapor Pressure, Boiling points and Intermolecular 
    attractions. 
 
Vapor Pressure – Force due to colliding gas molecules upwards from a liquid due to evaporation
The higher the rate of evaporation the higher the vapor pressure. 
 
2 factors that drive Vapor Pressure :
 
1) Temperature – If you increase the temperature the vapor pressure increases.  This makes sense! If you add more heat to a liquid it average kinetic energy increases and it will evaporate more.  Remember heat of vaporization?
2220 J/g :  More energy = More grams of water vaporized. 
 
2) Intermolecular attractactions (IMF’s) –  These are forces that keep molecules together in a solid or a liquid. If the IMF’s are greater than another liquid at the same temperature, the liquid with weaker IMF’s will be able to separate from each other and evaporate more readily thus producing more vapor pressure.
 
 
Boiling – is a phase change that represents a liquids maximum evaporation or vapor pressure.
 
The liquid’s boiling point represents when the liquids vapor pressure is maximum!  This maximum is attained when the vapor pressure of the liquid equals the opposing force of the pressure molecules of gas in the atmosphere (atmospheric pressure).

 

2 factors that drives Boiling Point :

1) Atmospheric Pressure – If the force of gas particles already in the air above are colliding at the surface of the liquid then how easily a gas particle can escape the liquid phase depends on how much these particle are colliding on the liquid.  Lower the atmospheric pressure and the boiling point will decrease. You will need less energy to escape if there is less force on top of you.

2) Intermolecular forces (IMF’s) – If a liquid evaporates very easy like butane (baggie demo Friday) then it does so because the temperature is low OR the IMF’s are very weak.  If the IMF’s are weak then the liquid does not need a lot of heat (lower temperature) to overcome the force of collisions due to the atmospheric pressure.

Period  8:
 

1.  Vapor pressure lesson –  We will be studying  intensive properties of liquids called vapor pressure.

                        a) boiling is relative – boiling is not based on temperature – baggie demo

                                     – Intermolecular forces is a factor in boiling

                                               LIquid Smear Demo

                                 – atmospheric pressure is a factor in boiling- how do we know that is exists?

                                           Vacuum demos: 

                                                                     a)  Accordian Container demo

                                                                     b) Boil water at room temperature.

2. Complete the classwork:

 

vapor pressure ditto 1 and 2 combined.pdf
 
vapor pressure Key combined.pdf
View Download

Period  9:

 
Completed the classwork.
                                                                                        

Vaporization Presentation:

 

 

 

Today’s Lesson:

Boiling depend on pressure- Room Temperature water Boiling Demo:

Boiling Cold Demo – Butane in a Baggie:

Boiling Cold Demo – Butane in a Baggie:

Vapor pressure of liquids Demo – The Smear Races:

Vapor pressure in a Paint Can – Liquid Nitrogen Demo:

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11/14 –  Monday  “B” Day Homework:  
 
 
 1. Please complete the form below based on the embedded video demos.  I did the first demo in class.
You have a total of three submissions. 
 
 

 
1: Smear Demo Quiz Form:                 

 

 

End of Monday!!!

 

_______________________________________________________                                                                             Jump to:  Tuesday Homework 

11/15 – Tuesday “A” Day – 

Main focus: 

a)  To review the concepts of vapor pressure, IMF’s, and boiling point.
 b) To identify the new boiling point if pressure changes in Table H.
 c) To identify where liquid nitrogen would fit in table H.
 
Period  9:
 

1. Complete the classwork:

 

vapor pressure ditto 1 and 2 combined.pdf
 
vapor pressure Key combined.pdf
View Download
 
2.  Heat of condensation Demo – GOLD FISH DEMO.

3.  Temperature and volume demonstration – Gas Law begin!.

 

Today’s Lesson:

Bubble wrap and the Vacuum Chamber: Proof that atmospheric pressure is present. Take it away and there is less force pushing in the plastic bubbles of air and thus these air bubble expand till they pop.

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11/15 –  Tuesday  “A” Day Homework: 
 
1.  Please complete the Vapor pressure Form 2 below based on the principles of Vapor Pressure, IMF’s , heat vaporization, and boiling points.                                                  
 
1: Vapor Pressure Form 2:     
            

 

 

End of Tuesday!!!

 

 ________________________________________                                                                                           Jump to:  Wednesday Homework 

11/16 – Wednesday – B Day – Lab

Main focus: 

 
1. To identify the location of the vapor pressure curve on Table H and compare its IMF, boiling point, and heat of vaporization to liquids currently on the table.
 
2. To introduce the Gas Laws. 
 
Period  8:
 
1.   Proof of atmospheric pressure demo – square 
 
2.  Gas Law Begin –  The balloon and liquid nitrogen demo
 
gas law regents level dittos 0910.pdf
View Download
 
gas law regents level dittos 0910 key.pdf
View Download

 

Period  9:   
                             
1.  Heat of Fusion of Ice Cream activity.
                    

           Liquid Nitrogen notes:

               N2(l) facts:     boiling point/condensation point =  -196ºC, 77 K, – 320 F

                                         heat of vaporization =  199 J/g

 Red line = nitrogen,  Blue line = oxygen.

Pressure square demo with our 4th graders:

Todays Lesson:

Boyles Law Demo: Pressure decreases the volume increases – (inverse relationship).

Charles Law Demo: Temperature decreases the Volume decreases – (direct proportion)

__________________________________________________________
 11/16 –  Wednesday – “B” Day homework: –
 

 There is no homework tonight!

 
 

___________________________________________                                                                                              Jump to:  Thursday Homework

11/16 – Thursday “A” Day 

 
Main focus:   
 
1.  To Calculate a new volume, temperature, or pressure using the combined gas law formula.
2.  To identify how Pressure, Temperature, and Volume affects a gas.
 

 

Period  9:

1.  Continue with our classwork gas law packet.  Page 2 – Charles Law.

gas law regents level dittos 0910.pdf
View Download
 
gas law regents level dittos 0910 key.pdf
View Download

 

2.   Temperature / pressure demo  – egg in bottle

                                                                 – Air Horn

 

Todays lesson:

Charles Law Demo: Temperature decreases the Volume decreases – (direct proportion)

Gay- Lussac’s Law Demo: Temperature decreases the Pressure decreases – (direct proportion)

__________________________________________________________________

11/16 –  Thursday – “A” Day homework: 
 
1.  Please complete the Gas Law Form 1 posted below.  You have 3 submissions.
_______________________________________________________________________________________
Connect
 
1: Vapor Pressure Form :     
            

 

 

End of Thursday!!!

 

Egg in and Out of the Bottle – Pressure and Temperature are a direct proportion

Egg in and Out of the Bottle – Pressure and Temperature are a direct proportion

_________________________________________________________________________________________________________________________

11/17 – Friday – “B” Day  

Main focus: 

1. To calculate with the combined gas law formula

2. To determine the absolute zero from a plot of pressure and temperature.
3. To Extrapolate a best fit line.
 
Period  8:
 
1) Classwork – Complete the Gas Law packet (page 4)  by using all of the variables (P,T, and V). 
Gas law regents level dittos 0910.pdf
 
gas law regents level dittos 0910 key.pdf
View Download

 

2) Crush the can Demo –

Period  9:   
                         
1) Lab 8- Determine the experimental value of absolute value of Temperature in Kelvins.
 
LAB 8 Determination of absolute zero.pdf 
 
                                                                                                                 

Combined Gas law Formula animation:

Todays Lesson:

11/17 –  Friday – homework: –
 
No Homework this weekend!
 
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