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Boiling point of Ethylene Glycol is more than that of water.  The vapour pressure of that is less than that of water vapour.  So the boiling point of water mixed with glycol will increase.

Elevation in boiling point of water in degrees kelvin
      = Kb * b

b = b_solute * i 
   b_solute = molality of glycol in the solution    = number of moles / kg of solution
   i = number of particles or ions per molecule in the solution.

Kb =  ebullition  constant, this is dependent on the solution, (ie., water)
   Kb =  R T² M / ΔH
         R = Universal gas constant          T = normal boiling point of solution
         M = molar mass of solution          ΔH = latent heat of vapourization /mole

The elevation in the boiling point of  the solution is linearly proportional to the concentration of Glycol.

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