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Homework Help: Heat problem

  1. Apr 3, 2010 #1
    1. The problem statement, all variables and given/known data

    How much heat is required to convert 1.0 kg of water at 85°C to steam at 118°C?

    2. Relevant equations

    Q=mc(delta)T
    Qw+Qs=0?

    3. The attempt at a solution
    we know the m(water)=1.0kg and c(water)=4186J/kgC and T=85C
    so using Heat (Q) formula Q=mcT--- (1.0kg)(4186J/kgC)(85C)=306*105
    then from here where I got stuck because there is no mass for steam and I thought of finding the mass steam first, so can someone show me the step?
     
  2. jcsd
  3. Apr 3, 2010 #2
    If you evaporate 1 kg of water, how much steam do you get?
     
  4. Apr 3, 2010 #3
    2.26*103kJ/kg?
    I don't get your question.......
     
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