When a liquid is placed in an open vessel, it slowly escapes into gas phase, eventually leaving the vessel empty. This phenomenon is known as evaporation. Evaporationof liquids can be explained in terms of kinetic molecular model. Although there are strong inter-molecular attractive forces which hold molecules of a liquid together, the molecules having sufficient kinetic energy can escape into gas phase if such molecules happen to come near the surface. In a sample of liquid all the molecules do not have same kinetic energy. There is a small fraction of molecules which have enough kinetic energy to overcome the attractive forces and escape into gas phase. Evaporation causes cooling. This is due to the reason that the molecules, which undergo evaporation, are high-energy molecules; therefore the kinetic energy of molecules which are left behind is less. Since the remaining molecules have lower average kinetic energy therefore, temperature must be lower. If the temperature is kept constant the remaining liquid will have the same distribution of molecular kinetic energies and the high-energy molecule will keep on escaping from the liquid into the gas phase. If the liquid is taken in an open vessel, evaporation will continue until whole of the liquid evaporates.
* Three petridishes of diameter 10 cm with covers * 10 ml pipette * Stop watch * Acetone * Benzene * Chloroform * Clean and dry the petridishes and mark them as A, B, C. * Pipette out 10 ml of acetone to petridish A and cover it. * Pipette out 10 ml of benzene in petridish B and cover it. * Pipette out 10 ml of chloroform in petridish C and cover it. * Uncover all the three petridishes simultaneously and start the stop-watch. * Note the respective time when the liquids evaporate completely from each petridish. Petridish MarkLiquid TakenTime taken for complete evaporation A Acetone 53 min B Benzene 42 min C Chloroform 30 min The rate of evaporation of the given three liquids is in the order: Chloroform > Benzene > Acetone
Evaporation has been a occuring thing since the earth was created but i dont have a clue to who had cameup with this idea
Nils Wallerius - Swedish - between 1739 - 1747 A. D.
Adam
Marie Curie
Niels Borh, a Danish scientist, discovered this in 1913
He discovered and invented different amazing stuffs that we would have never know about...he was a intelligent scientist who help to discover mystery of this world. He gave the law of gravity
some one i don't know who so
that the more heat u have the quicker the evaporation
A scientist named proust discovered it in 1779 A.D.
Sir Isaac newton discovered the Law of Motion.
SCIENTIST: Heinrich Friedrich Emil Lenz
I suspect you are searching for the British scientist Isaac Newton.
Antoine Lavoisier
He is the scientist that discovered Avogadro's Law/Number, which is the number of atoms, molecules, or particles in 1 mole of a substance.
who was the muslim scientist who discovered respiratory system
Robert Hooke is the scientist that discovered cells in plants.
The law of elasticity, or Hooke's law, was discovered by the British scientist Robert Hooke. It states that the stretching of a solid body is proportional to the force applied to it.
Isaac Newton is the correct answer. Newtons law of light.;)
Sir Isaac Newton