When a whistling teakettle is taken off the heat, the whistle gets weaker, because the pressure of the water vapor drops as the heat drops, although the visible water droplets momentarily increase.
2.
:: I don't have time to go in to this any more today, but I think your step 2 ) may be wrong . " Evaporative cooling therefore causes a drop in the temperature of air proportional to the sensible heat drop and an increase in humidity proportional to the latent heat gain . " This is all about latent heat vs . sensible heat.
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