The Effect of Temperature and Concentration on Sur- face Tension for Ethanol Solution

Surface tension difference is responsible for Marangoni condensation or Marangoni pseudo-dropwise condensation. The surface tension of ethanol solution of different concentration and tem- perature was investigated experimentally. The experimental investigation showed that the surface tension de- creased with increasing temperature for different concontration solution; when temperature kept constant, the surface tension decreased with increasing concentration. Based on experimental value, a formula was fitted after considering the effect of ethanol mass concentration and temperature.