The boiling point of water is $pu100^circ C$. However, we uncover that even at room temperature, water can evaporate into gas.Therefore, water vapor have the right to exist at temperature of, say, $pu50^circ C$.

At what temperature, have the right to you say for certain that every water vapor will certainly turn into liquid?In various other words, what is the condensation suggest of water?


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You"re right - water vapor can exist at temperatures such together $pu50^circ C$. This is a phenomenon well-known as evaporative cooling, whereby molecules that water with higher kinetic energies have tendency to "release" themselves from the system, and also as a result, less and also less water molecules are organized within that system.

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Temperature is a type of proxy for kinetic energy, and also vice versa. Reference, also, the Maxwell-Boltzmann distribution, which reveals the at $pu100^circ C$, because that example, no all molecules in the mechanism possess the kinetic energy that they would certainly at $pu100^circ C$, yet rather the mean exists at the temperature.

To answer her question, never in a genuine scenario.


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From a chemical engineering perspective (where we do a lot v steam), the answer is dependence on if you"re in a closed system or not. If I put some water in a closeup of the door container, it would certainly evaporate only enough such the the gaseous water would certainly reach the vapor press at that specific temperature. Every temperatures over $pu0 K$ have a non-zero vapor pressure, therefore you could say the water evaporates at all temperatures, at least for a while, and then it will certainly be in equilibrium v the liquid (or solid) state. However, if you room not in a closed device (say, exterior with a cup of water), climate the water will continue to evaporate to reach the vapor pressure, but the gas will proceed to escape, therefore the water will never stop evaporating.

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The opposite, and also the answer to her question, is likewise true. If you have circumstance when the neighboring pressure as result of water vapor is higher than the vapor push of water at the temperature (like a rain cloud cooling down), climate the water will begin to precipitate. Of course, prefer all equilibrium, even if the existing net phase shift is from gas towards liquid water, few of the liquid will certainly still be evaporating - it"s just that much more gas will certainly be condensing.