Answer to Question #343801 in General Chemistry for Phumlani

Question

in order to find the best method to boil water,one litre of water is put in a pot to heat on a stove and one litre is boiled in a kettle. the time to reach boiling point is 100 degrees celsius is recorded. provide suitable hypothesis?

Answer 1

Boiling point is the temperature at which a liquid starts boiling and changing phase into the gas phase. The phase transition happens when the vapor pressure becomes equal to atmospheric pressure.

in a closed container, the vapor pressure rises faster and equals atmospheric pressure faster. This is because an increase in temperature in a closed container causes the pressure to rise more than the volume. on the contrary, an increase in temperature in an open container causes a greater increase in volume than pressure.

In addition, water transfers a small amount of heat to the air that touches it, ie heat loss is observed. this is higher in open container water than in closed container.

The pot does not have a lid, ie an open pot. The kettle has a lid. therefore, it is better to boil water in a kettle than in a pot.

In addition, the thickness and thermal conductivity of the vessel must be taken into account.

ANSWER: the best method to boil water is to boil it in a kettle