What minimum heat is needed to bring 250 g of water at 20 ∘c to the boiling point and completely boil it away? the specific heat of water is 4190 j/(kg⋅k) and its heat of vaporization is 22.6×105 j/kg.

633.8 KJ

Explanation:

Given

mass of water

Initial temperature

Final temperature

Specific heat of water =4190 J/kg-k

heat of vaporization

Heat required for process=heat to raise water temperature from 20 to 100 +Heat to vapourize water completely

Q=mc

Q=

Q=

Q=

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.