Question

Explain the following: You add 100 mL water to a 500-mL round-bottom flask and heat the water until it is boiling. You remove the heat and stopper the flask, and the boiling stops. You then run cool water over the neck of the flask, and the boiling begins again. It seems as though you are boiling water by cooling it.

Answer 1

Step-by-step explanation:

Using Gay Lussac's law of pressure being directly proportional to temperature in kelvin at constant volume and the content kept at equilibrium, when the cool water is poured on the bottle, it takes heat from the gas plus the liquid thereby reducing the temperature and the pressure reduces also. The liquid will boil again because reduced pressure will reduced the boiling of the liquid until equilibrium is attained.