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Physical properties of gases

 Objectives

  • Learn and understand physical properties of gases and explain observations in terms of the kinetic molecular theory of gases.
  • Plot and calculate the root mean square speed of the Carvone molecules. (Comparison with speed in vacuum).
  • Estimate volume and volume change of a balloon when it goes from room temperature (RT) to liquid nitrogen temperature.
  • Observe and explain behavior of gas in: a soda can, a balloon in a flask, Cartesian diver, etc., when a change in pressure or temperature is applied.

Grading

You grade will be determined according to the following:

  • Pre-lab (10%)
  • Lab Report Form (80%)
  • TA points (10%)

Introduction

Expanding and contracting balloons, imploding soda cans, exploding marshmallows are just some of the demonstrations that are often used to illustrate the empirical gas laws and the kinetic molecular theory of gases. In this experiment, you will be performing these and other‘demonstrations’and using your understanding of the physical properties of gases to explain your observations.

There will be demonstrations laid out at seven different stations (2 sets at each) around the room and you will go in 2 groups of 4 people (two sets of lab partners) to each station (you don’t need to start with #1). If your group is assigned or start with, for example 5, you should then follow the following order: 5, 6, 7, 1, 2, etc. Your group should spend no more than 15 minutes at each station. Perform the experiment by following the instructions placed at each station. Then discuss your observations with your group. For each of the activities, it is important to ask yourself what is going on, "how can our observations be explained using the kinetic molecular theory of gases?" Remember that for some demonstrations calculations may be required also. Be thorough and precise in your explanations.

 CAUTION: Important Safety Notes:

Remember to use tongs, hot grips as appropriate when dealing with hot liquids, vapors and containers.

Liquid nitrogen is extremely cold, with a boiling point of -196C and if it comes into contact with skin can result in severe frostbite.

The vacuum dessicator should be regarded as a potential implosion hazard when evacuated. Handle it carefully.

When doing the egg experiment do not put hot flask immediately in the water bath (let it for at least 3 minutes sitting on the bench) it will crack and you may have to pay for it if it breaks.

Observe and record what happens in your laboratory report form.

You are encouraged to discuss among yourselves possible explanations to your observations.

Experimental procedure

Diffusion:

The goal of this experiment is to measure the rate of diffusion of Carvone, a major component of spearmint oil. Find an area where there are few drafts and the air does not already smell of spearmint. (You may go to the hallway to perform the experiment)

Stand in a line, with the first person in the group holding the bottle of Carvone and several paper towels. All four people should be 1 meter apart. You will need to know the distance each person is from the bottle of Carvone. The fourth person should act as the timekeeper. When the timekeeper gives the signal, the first person should place a few drops of Carvone on the paper towels. Record the time that it takes for each person to smell the Carvone. Seal the paper towel in a plastic bag when you are finished.

Questions & Answers

How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Honors chemistry lab fall. OpenStax CNX. Nov 15, 2007 Download for free at http://cnx.org/content/col10456/1.16
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