Monday, November 7, 2011

The Laws of Temp. Volume and Presure

Real life example: when you put a marshmellow in the microwave. when you turn the mirowave on the temp. increases. when the temp. increases the volume increases also. but the preasure dose not change. this example shows the Charel's Law



Boyle's Law- constant tempurare and preasure and volume are inversley related( when one goes up the other goes down.)
This law is shown in the marshmellow station. When you push the suryeng you are increasing the preasure. This shrinks the volume of the marshmellow, and is why the marshmellow shrivels up. When you pull on the suryeng the marshmellow grows. This is due to the decrease in preasure and an increase in volume.

Charel's Law-Tempurature and volume are directly related. Preasure stays consistant.
One of the labs that exemplified this law was the heating of the balloon. As heated the balloon with a heater, we changed the tempuratureinside of it. as the air inside the balloon heated the particals became farther apart. this made the volume become larger. but the presurewas not changed.
Gay-Lusaac's Law- Tempurature and preasure are directly related. Volume is consistant.
We did a lab that was an example of the Gay-Iusaac's law. In the lab we had an air compresser and a syrenge with a thermometer in it. As we pumped air into the bottle, the pressure was increased which caused the temperature to increase as well. The temperature increased because the more pressure you apply to an object the hotter it gets. the gas in the bottle get hotter due to the molicules that are bouncing off of eachother. This shows the gay-iusaac's law by having the volume remain consistent, and increasing the pressure making the temperature increase. Here is the data we collected. (In the lab we applied the pressure by useing an air pump. Then we recordedthe preasure and the temperature and then gradually let the pressure out and repeated the proceedure.)
Pressure vs. temp(degrees F)
60psi-81
43psi-79
30psi-75
21psi-73
48psi-79
42psi-75
24psi-75
20psi-21
9psi-71

1 comment:

  1. Good Job. You backed up your answers nicely. You included all your info, and it looks very clean and easy to read(:

    ReplyDelete