If volatily is the ease with which a liquid turns into a gas, then does that mean all liquids evaporate? Is evaporation the state change from liquid to gas? Does this happen at below the boiling point (eg leaving some water at room temperature) because of the Boltzmann distribution, i.e. even at a temperature of 20 degrees celsius, some molecules have enough energy to turn into a gas, and eventually all molecules will leave the container in which the liquid is held?
Is it only liquids that do this (can sublimation be spontaneous, without a heat source?), and is there any point below which liquids do not evaporate, except melting point? Or does it just become so slow near the melting point that it can not be observed?
Also, when you're boiling a kettle, some of the water is turning into steam (a gas) which you can't see, immediately next to the spout, but what you can see is water vapour, a little further away from the spout, where the steam has hit the (relatively) cold air and condensed into water droplets, liquid suspended in air. Is this correct?
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