Water is boiling in the vessel. Find a way to boil water without energy.

It is impossible to boil water in a vessel floating in a container with boiling water, since for boiling (vaporization process) it is necessary for water heated to the boiling point to transfer additional energy equal to the mass of water multiplied by the specific heat of vaporization. In this case, the temperature of the water in the floating pan can reach the boiling point, after which the temperature of the water in both containers will equalize, and the heat transfer process will stop.

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