They are reversible changes because they don't lead to the changes in chemical properties like boiling point, melting point, no. of electrons, etc. but changes the physical properties like mass, temperature, pressure, etc.
When a liquid gains energy and changes into a gas, it is called vaporization or evaporation. This process involves the molecules of the liquid gaining enough energy to overcome the intermolecular forces holding them together as a liquid.
Boiling and evaporization. Boiling is mainly used with water, but if you notice, hand sanitizer does not boil when you rub it in, it just evaporates, the friction from your hands is the heat..
You think probable to evaporation and boiling.
Water changes from a liquid to a gas in a process known as evaporation. (Think about a boiling pot of water on a stove).As the temperature rises, the water becomes water vapor, a gas.
Evaporation takes place at any temperature but boiling takes place only at a substance's boiling point.
i think that u were asking about the difference between evaporation and boiling. Some key points are 1) Evaporation takes internal energy while for boiling we have to provide external energy or we have to reduce the pressure. 2) As Evaporation takes internal energy therefore evaporation results in cooling while this is not observed in boiling. 3) Evaporation occurs below saturated temperature while Boiling occurs at and above saturated temperature. 4) Evaporation occurs at liquid-vapor interface while Boiling occurs at solid liquid interface. 5) Vapor bubbles are formed in Boiling while in Evaporation there are no bubble formation and no bubble motion. 6) There are different regimes of boiling (like nucleate boiling, transition boiling, film boiling etc.) while these regimes are not present in Evaporation. 7) Rate of Evaporation is much slower than the Boiling. 8) Example of Evaporation are Water in a lake at 20°C, evaporates to air at 20°C and 60 percent relative humidity since the saturation pressure of water at 20°C is 2.34 kPa, and the vapor pressure of air at 20°C and 60 percent relative humidity is 1.4 kPa. Other examples of evaporation are the drying of clothes, fruits, and vegetables; the evaporation of sweat to cool the human body; and the rejection of waste heat in wet cooling towers. i am hoping that the above comparison will give you the clear picture about the evaporation and boiling.
If you think strictly to evaporation differences are not significant.If you think to boiling the boiling point is higher for solutions containing dissolved substances as saline water.
i think that u were asking about the difference between evaporation and boiling. Some key points are 1) Evaporation takes internal energy while for boiling we have to provide external energy or we have to reduce the pressure. 2) As Evaporation takes internal energy therefore evaporation results in cooling while this is not observed in boiling. 3) Evaporation occurs below saturated temperature while Boiling occurs at and above saturated temperature. 4) Evaporation occurs at liquid-vapor interface while Boiling occurs at solid liquid interface. 5) Vapor bubbles are formed in Boiling while in Evaporation there are no bubble formation and no bubble motion. 6) There are different regimes of boiling (like nucleate boiling, transition boiling, film boiling etc.) while these regimes are not present in Evaporation. 7) Rate of Evaporation is much slower than the Boiling. 8) Example of Evaporation are Water in a lake at 20°C, evaporates to air at 20°C and 60 percent relative humidity since the saturation pressure of water at 20°C is 2.34 kPa, and the vapor pressure of air at 20°C and 60 percent relative humidity is 1.4 kPa. Other examples of evaporation are the drying of clothes, fruits, and vegetables; the evaporation of sweat to cool the human body; and the rejection of waste heat in wet cooling towers. i am hoping that the above comparison will give you the clear picture about the evaporation and boiling.
condensation =)
You think probable to melting or boiling of NaCl.
You think probable to a reversible reaction.
They are similar in that both result in some of the liquid being lost to the surrounding ambient volume as a gas. The specific gas depends on the liquid. It's called steam when the liquid is boiling water. It's called humidity when it's evaporated water. They are different in the speed at which the liquid is converted into gas and in the nature of the gas emitted into the air. For evaporation, the liquid quietly off gases fairly slowly so the amount of gas (molecule sized particles) above the liquid is typically not visible to the naked eye. But for boiling, the liquid bubbles and off gases fairly rapidly so the amount of gas above the boiling liquid is seen as steam (if the liquid is water). We see the steam and not the humidity because the size of steam particles is larger than the molecular size of humidity.