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✖Surface Tension of Clean Water Surface is the energy, or work, required to increase the surface area of a clean water surface due to intermolecular forces.ⓘ Surface Tension of Clean Water Surface [γo]
+10%
-10%
✖Surface Tension of Fluid is the energy or work required to increase the surface area of a fluid due to intermolecular forces.ⓘ Surface Tension of Fluid [γ]
+10%
-10%
✖The Surface Pressure of Thin Film is the difference in interfacial tension between a clean interface and an interface in the presence of an emulsifier.ⓘ Surface Pressure [Π]
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Surface Pressure

Formula
`"Π" = "γ"_{"o"}-"γ"`

Example
`"0.001Pa"="74mN/m"-"73mN/m"`

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Surface Pressure Solution

STEP 0: Pre-Calculation Summary
Formula Used
Surface Pressure of Thin Film = Surface Tension of Clean Water Surface-Surface Tension of Fluid
Π = γo-γ
This formula uses 3 Variables
Variables Used
Surface Pressure of Thin Film - (Measured in Pascal) - The Surface Pressure of Thin Film is the difference in interfacial tension between a clean interface and an interface in the presence of an emulsifier.
Surface Tension of Clean Water Surface - (Measured in Newton per Meter) - Surface Tension of Clean Water Surface is the energy, or work, required to increase the surface area of a clean water surface due to intermolecular forces.
Surface Tension of Fluid - (Measured in Newton per Meter) - Surface Tension of Fluid is the energy or work required to increase the surface area of a fluid due to intermolecular forces.
STEP 1: Convert Input(s) to Base Unit
Surface Tension of Clean Water Surface: 74 Millinewton per Meter --> 0.074 Newton per Meter (Check conversion here)
Surface Tension of Fluid: 73 Millinewton per Meter --> 0.073 Newton per Meter (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Π = γo-γ --> 0.074-0.073
Evaluating ... ...
Π = 0.001
STEP 3: Convert Result to Output's Unit
0.001 Pascal --> No Conversion Required
FINAL ANSWER
0.001 Pascal <-- Surface Pressure of Thin Film
(Calculation completed in 00.004 seconds)
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Created by Pratibha
Amity Institute Of Applied Sciences (AIAS, Amity University), Noida, India
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Verified by Prerana Bakli
University of Hawaiʻi at Mānoa (UH Manoa), Hawaii, USA
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3 Surface Pressure Calculators

Surface Pressure using Co-Area
Go Surface Pressure of Thin Film = ([BoltZ]*Temperature)/(Area of Ideal Film-Co-Area of Ideal Film)
Surface Pressure for Ideal Gas Film
Go Surface Pressure of Thin Film = ([BoltZ]*Temperature)/Area of Thin Film
Surface Pressure
Go Surface Pressure of Thin Film = Surface Tension of Clean Water Surface-Surface Tension of Fluid

17 Important Formulas on Surface Tension Calculators

Force given Surface Tension using Wilhelmy-Plate Method
Go Force = (Density of Plate*[g]*(Length of Plate*Width of Full Size Bearing Plate*Thickness of Plate))+(2*Surface Tension of Fluid*(Thickness of Plate+Width of Full Size Bearing Plate)*(cos(Contact Angle)))-(Density of Fluid*[g]*Thickness of Plate*Width of Full Size Bearing Plate*Depth of Plate)
Surface Tension given Contact Angle
Go Surface Tension of Fluid = (2*Radius of Curvature*Density of Fluid*[g]*Height of Capillary Rise/Fall)*(1/cos(Contact Angle))
Surface Tension given Molecular Weight
Go Surface Tension of Fluid = [EOTVOS_C]*(Critical Temperature-Temperature-6)/(Molecular Weight/Density of Liquid)^(2/3)
Surface Tension of Pure Water
Go Surface Tension of Pure Water = 235.8*(1-(Temperature/Critical Temperature))^(1.256)*(1-(0.625*(1-(Temperature/Critical Temperature))))
Surface Tension given Critical Temperature
Go Surface Tension of Fluid given Critical Temp = Constant for each Liquid*(1-(Temperature/Critical Temperature))^(Empirical Factor)
Surface Tension given Correction Factor
Go Surface Tension of Fluid = (Drop Weight*[g])/(2*pi*Capillary Radius*Correction Factor)
Surface Tension given Molar Volume
Go Surface Tension of Fluid given Molar Volume = [EOTVOS_C]*(Critical Temperature-Temperature)/(Molar Volume)^(2/3)
Height of Magnitude of Capillary Rise
Go Height of Capillary Rise/Fall = Surface Tension of Fluid/((1/2)*(Radius of Tubing*Density of Fluid*[g]))
Surface Tension Force given Density of Fluid
Go Surface Tension of Fluid = (1/2)*(Radius of Tubing*Density of Fluid*[g]*Height of Capillary Rise/Fall)
Total Weight of Plate using Wilhelmy-Plate Method
Go Total Weight of Solid Surface = Weight of Plate+Surface Tension of Fluid*(Perimeter)-Upward Drift
Total Weight of Ring using Ring-Detachment Method
Go Total Weight of Solid Surface = Weight of Ring+(4*pi*Radius of Ring*Surface Tension of Fluid)
Parachor given Surface Tension
Go Parachor = (Molar Mass/(Density of Liquid-Density of Vapor))*(Surface Tension of Fluid)^(1/4)
Surface Pressure using Wilhelmy-Plate Method
Go Surface Pressure of Thin Film = -(Change in Force/(2* (Thickness of Plate+Weight of Plate)))
Surface Tension given Temperature
Go Surface Tension of Fluid given Temperature = 75.69-(0.1413*Temperature)-(0.0002985*(Temperature)^2)
Surface Pressure
Go Surface Pressure of Thin Film = Surface Tension of Clean Water Surface-Surface Tension of Fluid
Work of Cohesion given Surface Tension
Go Work of Cohesion = 2*Surface Tension of Fluid*[Avaga-no]^(1/3)*(Molar Volume)^(2/3)
Surface Tension for very Thin Plate using Wilhelmy-Plate Method
Go Surface Tension of Fluid = Force on very Thin Plate/(2*Weight of Plate)

Surface Pressure Formula

Surface Pressure of Thin Film = Surface Tension of Clean Water Surface-Surface Tension of Fluid
Π = γo-γ

What is surface pressure in relation to Langmuir monolayer?

If the available surface area of the monolayer is reduced by a barrier system, the molecules start to exert a repulsive force on each other. This two-dimensional analog of pressure is called surface pressure, π, and is given by the relationship. π = γ0 – γ

How to Calculate Surface Pressure?

Surface Pressure calculator uses Surface Pressure of Thin Film = Surface Tension of Clean Water Surface-Surface Tension of Fluid to calculate the Surface Pressure of Thin Film, The Surface Pressure formula is defined as the difference in surface tension between a clean air-water surface and solution. Surface Pressure of Thin Film is denoted by Π symbol.

How to calculate Surface Pressure using this online calculator? To use this online calculator for Surface Pressure, enter Surface Tension of Clean Water Surface (γo) & Surface Tension of Fluid (γ) and hit the calculate button. Here is how the Surface Pressure calculation can be explained with given input values -> 0.001 = 0.074-0.073.

FAQ

What is Surface Pressure?
The Surface Pressure formula is defined as the difference in surface tension between a clean air-water surface and solution and is represented as Π = γo-γ or Surface Pressure of Thin Film = Surface Tension of Clean Water Surface-Surface Tension of Fluid. Surface Tension of Clean Water Surface is the energy, or work, required to increase the surface area of a clean water surface due to intermolecular forces & Surface Tension of Fluid is the energy or work required to increase the surface area of a fluid due to intermolecular forces.
How to calculate Surface Pressure?
The Surface Pressure formula is defined as the difference in surface tension between a clean air-water surface and solution is calculated using Surface Pressure of Thin Film = Surface Tension of Clean Water Surface-Surface Tension of Fluid. To calculate Surface Pressure, you need Surface Tension of Clean Water Surface (γo) & Surface Tension of Fluid (γ). With our tool, you need to enter the respective value for Surface Tension of Clean Water Surface & Surface Tension of Fluid and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Surface Pressure of Thin Film?
In this formula, Surface Pressure of Thin Film uses Surface Tension of Clean Water Surface & Surface Tension of Fluid. We can use 3 other way(s) to calculate the same, which is/are as follows -
  • Surface Pressure of Thin Film = ([BoltZ]*Temperature)/Area of Thin Film
  • Surface Pressure of Thin Film = ([BoltZ]*Temperature)/(Area of Ideal Film-Co-Area of Ideal Film)
  • Surface Pressure of Thin Film = -(Change in Force/(2* (Thickness of Plate+Weight of Plate)))
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