A bowl of water, initially at 1 0 ∘ C is brought to boiling after being 9 minutes at the stove top. If it remains on the stove top, how long will it further take for all the water to evaporate? Neglec

Question

A bowl of water, initially at 1 0 ∘ C is brought to boiling after being 9 minutes at the stove top. If it remains on the stove top, how long will it further take for all the water to evaporate? Neglect heat losses and the heat capacity of the bowl.

TestHub · Accepted Answer

Take s = 1 cal/g ∘ C and L v ​ = 540 cal/g. Heat to warm the water from 1 0 ∘ C to 10 0 ∘ C in 9 min : P × 9 = m × 1 × 90 P = 10 m cal/min Heat to evaporate all the water: P t = m × 540 t = 10 m 540 m ​ = 54 min

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