jueves, 20 de febrero de 2014

Pressure and Temperature relation


In this experiment we have seen Gay-Lussac´s law comparing pressure at different temperatures. As we may recall pressure and volume are proportionally related.

Initial pressure/Initial temperature=Final pressure/Final temperature

We did the experiment with logger pro and took the result of the pressure

Results with logger pro (KiloPascals)

15º C: 6,3 kPa
20ºC : 10,1 kPa
25ºC: 15,2 kPa
30ºC: 21.7 kPa

Table:

Temperature (ºC)
Pressure (KPa)
15.0
6.3
20.0
10.1
25.0
15.2
30.0
21.7

Graph:














CONCLUSION
As we can see in our results, as the temperature increases, the pressure also increases. Gay Lussac's law states that when there is more temperature, higher is the pressure because the particles move faster. This is because the temperature give energy to the partices, so when the temperature is higher, it gives ore energy to the partciles to move faster, causing more pressure.

Still, this results are not very accurate since when we took of the vacum pressure started increasing cause air was entering due to the fact that our equipment is not perfect. To make sure the changes in pressure were not only for air entering after doing all 4 temperatures we put it back in 15ºC and it dropped down to 10,5 kPa which shows that Temperature and pressure are directly related.
Here are some images from the experiment:

 Here we are checking pressure at 30ºC with Maria´s bath. Data are being taken to the Logger Pro program
This is the material we used to take out the air so our initial pressure was 0 torrents

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