Université de Nancy I Laboratoire de Spectroscopie et des Techniques Microondes, E.R.A. AU C.N.R.S. nℴ 22, Interactions Moléculaires Boite Postale nℴ 239 54506 Vandoeuvre les Nancy Cedex France Boite Postale nℴ 239 54506 Vandoeuvre les Nancy Cedex France
The evaporation of a polar liquid at low pressure and exposed to microwave radiation has been investigated, as an example of an endothermic reaction. A fixed, high column of liquid was irradiated in a waveguide with 2.45 MHz-CW microwave radiation. The temperatures of the gas and the liquid in contact with the interface and the evaporation rate were measured as functions of the non-equilibrium gas pressure and the microwave field.