# Surface Tension

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• Topic: Surface tension, Liquid, Water
• Pages : 4 (1209 words )
• Published : November 22, 2012

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Processed Data:
Table 1: Data in measuring the height of the water
Trial| Height of water (m)|
1| 0.032|
2| 0.032|
3| 0.032|
Average:| 0.032|

Table 2: Values for measuring the radius of capillary
Temperature| 30 degrees Celsius|
Density @ 30 degrees Celsius| 995.67 kg m-3|
Acceleration due to gravity| 9.8 m s2|
Height of water| 0.032 m|
Surface tension of water@ 30 degrees Celsius| 7.118 X 10-2 N m| Radius of capillary tube| 4.5592825 X 10-4 m|

Table 3: Values for the height of n-butanol solutions in capillary tube Temperature| Trial| 0.1 M| 0.2 M| 0.4 M| 0.6 M| 0.8 M| 30 degrees Celsius| 1| 0.022| 0.023| 0.023| 0.024| 0.025| | 2| 0.022| 0.023| 0.024| 0.025| 0.026|

| 3| 0.022| 0.024| 0.024| 0.025| 0.026|
Average| 0.022| 0.0233| 0.0237| 0.0247| 0.0257|

Table 4: Values for surface tension
Concentration| Density (kg m3)| Acc. due to gravity (m s-2)| Height (m)| Radius (m)| Surface tension (N m-1)| 0.1 M| 910| 9.8| 0.022| 4.5592825 X 10-4| 0.04472564947| 0.2 M| 920| | 0.0233| | 0.04788906204|

0.4 M| 930| | 0.0237| | 0.04917091975|
0.6 M| 940| | 0.0247| | 0.05187013633|
0.8 M| 950| | 0.0257| | 0.0545442923|

Table 5: Values for excess concentration, cross-sectional
area, & molecular radius of n-butanol
Temperature| 303 K|
Excess concentration| 7.9387 mol m-2|
Cross-sectional area| 2.09 X 1048 Å|
Molecular radius of n-butanol| 8.156394192 X 1023 Å|

Figure 1: Plot of n-butanol concentration versus surface tension

Figure 2: Plot of surface tension versus ln C

Discussion:
The objective of the experiment is to use the capillary rise method to determine the surface tension of the working solution – in this case, the increasing concentrations of n-butanol solution. In a solution, molecules experience intermolecular forces with each other. However, the molecules in the surface of the solution...