Thermo November 2006 PHY 151/161 5 points Name _______________________________
Start a web browser. Login to the MLC Learning course. Scroll down to find the list of links. At each web site do the activities outlined below. Rate the educational value of each web site from 1 (poor) to 10 (very good) .
______ 1. http://jersey.uoregon.edu/vlab/Thermodynamics/index.html Thermodynamic Equilibrium
Read the instructions. Scroll down. You are only required to do the First experiment. The others are optional. Record the following:
initial temperatures _____ _______ equilibrium temperatures ______ _______
You can use the mouse and drag the black square on the thermometer to set the temperature.
second case of equilibrium temperatures after right side is set to 900K ______ _______
If you have good hand-eye coordination try the Seventh experiment.
______ 2. http://zebu.uoregon.edu/nsf/balloon.html#BB
Balloon Maxwellian Velocity Distribution Read the instructions. Click on the Clear Graph button. Drag the black box on the thermometer to a temperature near 200 Kelvins. The temperature value is shown in the red bulb at the base of the thermometer. Let the applet display a new result before you change the temperature. Record the speed (MPS). _____________
Record the Pressure. _______________ Change the temperature to 800 Kelvins. Record the speed (MPS). _____________ Record the Pressure. _______________ Does the speed double when the temperature increases by a factor of 4? YES or NO
Does the pressure double when the temperature increases by a factor of 4? YES or NO
______ 3. http://zebu.uoregon.edu/nsf/piston.html Ideal Gas variables
The simulation may shows the effect of uncertainty in the data as the graphs are not perfectly smooth. a) Click the Ideal Gas Button, Click the constant volume button. Drag the black square on the thermometer to several higher and lower temperatures. Observe the graph. Is pressure directly proportional to temperature? YES or NO
b) Click on the reset button. Click on the Ideal Gas button and then the constant temperature button. Click on the à below the piston at least 5 times. Observe the graph. Is pressure directly proportional to volume? YES or NO
______ 4. http://comp.uark.edu/~jgeabana/mol_dyn/KinThI.html Kinetic Theory
Type 100 (the number of particles) into the white box. Click on Set. Click on Run. All of the objects start with the same speed. After many collisions have occurred draw the graph of the distribution of speeds that was displayed on the screen. Is this graph a close approximation to a Maxwell-Boltzmann distribution (shown in blue on the graph)? YES or NO
Stop the simulation. Change the number of particles to 9. Run the simulation. Why does it take longer for the distribution of speeds to be close to the Maxwell-Boltzmann distribution?
Write a one page summary of a magazine or Internet article which discusses one of the following topics: Ideal Gas, Maxwell’s Demon, Thermodynamics, Adiabatic, Isothermal, Heat Engine, Second Law of Thermodynamics, Entropy, Heat Pump, Carnot Engine or Equipartition of Energy. Read the article. Write neatly or type a one page summary of the article and turn in the summary. Write your name, the name of the magazine, month, year, page number (or Internet URL) and title of the article at the top of your summary page. Everyone should summarize a different article.