Buthanol Graphs

Here we can see the table, the graph and the conclusion from the experiment of buthanol. To see the rest of the lab report go to previous pages (Wednesday, 19th February post).

Table showing how pressure in kPa varies with time in s.
Buthanol Graph

Time (s) (x)	Pressure (kPa) (y)
335.8	11.6
290	11.6
285	11.2
242.9	10.8
233.2	10.8
224.4	11.2
204.6	11.6
180.6	11.6
167.4	11.5
144.6	10.8
136.7	10.5
122.7	9.7
117.4	7.9
109.5	7.9
100	7.9
70	7.1
0	5.6

Graph showing how pressure in kPa varies with time in s.

Conclusion:According to the results of the table and the graph we can conlude that as time increases, the pressure of buthanol does too. At 0ºC, the pressure was of 5 kPa, after a determined time (increase of time) and with higher temperature (16ºC), the pressure increased to 7 kPa. As we increassed temperature and time passed by, the variation in temperrature continued until it reached 11.6 kPa. This is the maximum pressure of this substance. We continued increasing the temperature and time passed but the pressure started to decrease and then it increased again with 40ºC. As time passes the pressure of buthanol rises because as it is volatile, it goes from liquid to gaseous state, so particles spread and hit against walls more often, there was a slight decrease between second 150 and second 200, maybe due to a change in the temperature or human error. Observing the table and graph we can conclude that as time changes pressure does too. As time increases pressure increases. However, pressure reaches its maximum point in 11.6 kPA. It is a "barrier", because despite the fact that time continues to increase, pressure remains constant. Furthermore, it even decreases to 10.8 kPA, though after 40 seconds it increases again.