Theoretical Value of Surface Tension at T, dyne/cm Calculated Surface Tension at T, dyne/cm (Water as Calibrating Liquid) Compounds Error Water 72.86 N/A Benzene Chloroform 27.5 Methanol 22.7 Unknown Liquid 27.0

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Solve for the theoretical value of the surface tension of Benzene using the formula 

 

information #Using water as the calibrating liquid, determine the surface tension of
benzene, chloroform, methanol and unknown liquid using equation 2.

 Surface tension of benzene can be computed as Υ = 31.58 – 0.137T + 0.0001T2
where T = temperature of benzene in oC. Compute for the surface tension
of water and the other test liquids using benzene as the calibrating liquid.

kindly help me solve for Calculated Surface Tension at T, dyne/cm (Water as Calibrating Liquid) this part only

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DATA SHEET
CHE 2131L
Height due to blowing, cm
Height due to suctioning, em
Compounds
Trial 1
Trial 2
Trial 3
Trial 1
Trial 2
Trial 3
Water
1.40
1.30
1.50
1.60
1.70
1.50
Benzene
0.50
0.80
0.70
0.90
0.60
0.70
Chloroform
0.30
0.50
0.50
0.50
0.30
0.30
Methanol
0.40
0.70
0.50
0.80
0.50
0.70
Unknown
0.50
0.50
0.40
0.30
0.30
0.40
| Liquid
Average Height,
Compounds
T (C)
Density (g/ce)
em
Water
20
0.9982
Benzene
4.2
20
0.8790
2.4
3.6
Chloroform
20
1.4592
Methanol
20
0.7807
Unknown Liquid
2.4
20
1.5800
Theoretical Value of
Surface Tension at T,
dyne/cm
Calculated Surface Tension at
T, dyne/cm
(Water as Calibrating Liquid)
Compounds
Error
Water
72.86
N/A
Benzene
Chloroform
27.5
Methanol
22.7
Unknown Liquid
27.0
Theoretical Value of
Calculated Surface Tension at
Surface Tension at T,
dyne/cm
T, dyne/cm
(Benzene as Calibrating
Liquid)
%
Compounds
Error
Water
Benzene
72.86
N/A
N/A
Chloroform
27.5
Methanol
22.7
|Unknown Liquid
27.0
Based on all data available, what is the unknown liquid?
Transcribed Image Text:DATA SHEET CHE 2131L Height due to blowing, cm Height due to suctioning, em Compounds Trial 1 Trial 2 Trial 3 Trial 1 Trial 2 Trial 3 Water 1.40 1.30 1.50 1.60 1.70 1.50 Benzene 0.50 0.80 0.70 0.90 0.60 0.70 Chloroform 0.30 0.50 0.50 0.50 0.30 0.30 Methanol 0.40 0.70 0.50 0.80 0.50 0.70 Unknown 0.50 0.50 0.40 0.30 0.30 0.40 | Liquid Average Height, Compounds T (C) Density (g/ce) em Water 20 0.9982 Benzene 4.2 20 0.8790 2.4 3.6 Chloroform 20 1.4592 Methanol 20 0.7807 Unknown Liquid 2.4 20 1.5800 Theoretical Value of Surface Tension at T, dyne/cm Calculated Surface Tension at T, dyne/cm (Water as Calibrating Liquid) Compounds Error Water 72.86 N/A Benzene Chloroform 27.5 Methanol 22.7 Unknown Liquid 27.0 Theoretical Value of Calculated Surface Tension at Surface Tension at T, dyne/cm T, dyne/cm (Benzene as Calibrating Liquid) % Compounds Error Water Benzene 72.86 N/A N/A Chloroform 27.5 Methanol 22.7 |Unknown Liquid 27.0 Based on all data available, what is the unknown liquid?
The method of capillary rise is based on the height to which the liquid in the
capillary will rise before the force due to surface tension is balanced by the force
due to gravity. At this point:
Y =
rhpg
where:y= surface tension of the liquid in dynes/cm
r= inner radius of the capillary used, cm
h = displacement of the liquid in the capillary as referred to the
outside surface, cm (rise if liquid wets glass, fall if it does not)
p= density of the liquid, g/cm³
g = 981 cm/s² (gravitational acceleration)
Because of the difficulty of measuring the inner radius of the capillary, the
Usual method is to use a calibrating liquid (one whose surface tension can be
computed or determined from another source).
hxp
Yx = Yct
"hcl
[2]
x = refers to the liquid sought
cl = refers to the calibrating liquid
where:
Transcribed Image Text:The method of capillary rise is based on the height to which the liquid in the capillary will rise before the force due to surface tension is balanced by the force due to gravity. At this point: Y = rhpg where:y= surface tension of the liquid in dynes/cm r= inner radius of the capillary used, cm h = displacement of the liquid in the capillary as referred to the outside surface, cm (rise if liquid wets glass, fall if it does not) p= density of the liquid, g/cm³ g = 981 cm/s² (gravitational acceleration) Because of the difficulty of measuring the inner radius of the capillary, the Usual method is to use a calibrating liquid (one whose surface tension can be computed or determined from another source). hxp Yx = Yct "hcl [2] x = refers to the liquid sought cl = refers to the calibrating liquid where:
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