(Solved): Sample problem: Surface tension of water at 20C is 7.27102Nm1 and its density is 0.998 ...

Expert Answer

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To calculate the ratio between the vapor pressure of a mist droplet and the vapor pressure of water at the plane surface, we can use the Kelvin equation, which relates the vapor pressure of a droplet to the vapor pressure of the plane surface based on the surface tension and density of the liquid. The Kelvin equation is given by:   
where: P is the vapor pressure of the droplet P_0 is the vapor pressure of the plane surface M is the molar mass of the liquid (in kg/mol)    is the surface tension of the liquid (in N/m) ? is the density of the liquid (in kg/m^3) R is the gas constant (8.314 J/(mol·K)) T is the temperature in Kelvin r is the radius of the droplet