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The total quantity of heat received by the soup

  1. Jun 17, 2012 #1
    1. The problem statement, all variables and given/known data
    frozen soup of a mass of 0,40kg enters a microwave at -15°C. after 6 minutes the soup eaches a ° of 75°C
    SHC of soup at solid state : c = 2100J/kg°C
    SHC of liquid soup : c = 4200K/kg°C
    SLH of fusion of soup : Lf = 330 000J/kg
    melting point of soup : 0°C
    THE QUESTION : WHAT IS THE TOTAL QUANTITY OF HEAT RECEIVED BY THE SOUP ?

    2. Relevant equations
    E = mcΔt
    E= mL

    3. The attempt at a solution
    E = mcΔT
    = 0,4 x 2100 x 15
    =12600 J

    E = mL
    = 0,4 x 330 000
    =132000J

    E = mcΔT
    = 0,4 x 4200 x 75
    =126000

    Etot = 132,000 + 12600 + 126000
    =270600 J

    teachers answer : 2 671 000 J
    i have no idea how to get to it i am in my 5th year at the european school
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jun 17, 2012 #2
    mms0101,

    I can't see anything wrong with your answer.

    Ratch
     
  4. Jun 18, 2012 #3

    rude man

    User Avatar
    Homework Helper
    Gold Member

    You're right, teach is wrong. Sure that was his answer?
     
  5. Jun 18, 2012 #4
    ill go talk to him tomorrow as i have another answer to do with circuits that mismatch his ill let you know :) thank you anyway
     
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