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=

this is a good question! i'll do some research and come back when i have the answer!

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