what causes water to evaporate every fluid (pure) has a definite vapor pressure at a fixed temperature , now if any how the partial presuure of the fluiid is less then the the vapor pressure of the fluid then the fluid starts evaporating to attain the partial pressure equal to the vapor pressure of the fluid, and then the equllibrium is reached and evaporation stops. basically at the top of the fluid there is a random motion of the fluid molecule due to the difference between the adhasive and cohesive forces, some molecule say 'n' goes into the vapur phase and some strikes back say m such that n>m then after the above explained condition is achived then the constraint m=n. conclusion whenever there is the fluid in liquid state is present then in that system partial pressure is exactly to the va...
NCERT class 6 History(Our past 1)= Done
ReplyDeleteTamil Nadu History Class 11= chap 1 to 14 done (remaining will do tommorow)
NCERT class 12(Themes of indian history 1)=done
I-Can + The hindu= will read now.
NCERT class 12(Themes of indian history 2)= NOT done
NCERT class 7=Our past 2= NOT done