water can boil at room temperature itself if we decrease the pressure.So to boil water at room temp say 28 degrees C we decrease pressure from 1 bar to 0.035 bar(from steam tables).
My question is- when we start decreasing the pressure (at 28 *C) from 1bar,does the water wait until pressure reaches 0.03 bar to evaporate OR WILL THE PROCESS OF EVAPORATION START AS SOON AS THE PRESSURE STARTS DECREASING?