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Water to Steam Energy Question

  1. Jan 28, 2007 #1
    1. The problem statement, all variables and given/known data

    How much energy does it take to transform 500 g (0.5kg) of liquid water at 20 oC to steam at 100 oC? Note that the specific heat capacity of liquid water is 4.28x10^3 J/Kg/oC and the latent heat of vaporization for water is 2.3x10^6 J/Kg.

    2. Relevant equations
    Eh=mct ; m1c1t1=-m2c2t2 ; Eh = mLf ; Eh= mLv

    3. The attempt at a solution

    no clue..please help..
  2. jcsd
  3. Jan 28, 2007 #2

    Chi Meson

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    Two steps. first the water needs to be heated to 100 C, then the water has to evaporate. Both steps involve heat going into the water. Which two of those 4 equations do you need?

    By the way, in the first and second equation you list, it is not "T" but "change in T." (The triangle, "delta," means "change in...")
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