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Calorimetry homework

  1. Jun 29, 2012 #1
    1. The problem statement, all variables and given/known data

    when a metal cylinder of mass 0.02kg and specific heat capacity 500J/kg/K is heated by an electric heater working at a constant power, the initial rate of rise of temperature is 3K/min. After a time the heater is switched off and the initial rate of fall of temperature is 0.3K/min. what is the rate at which the cylinder gains heat energy immediately before the heater is switched off? ans 0.45w

    2. Relevant equations
    Q=mc(dT)



    3. The attempt at a solution
    heat gained per second
    Q=0.02x500x3/60=0.5W
    Q=0.02x500x0.3/60=0.05W
    0.5-0.05=0.45W
    i did this just tried but didnt get the concept of the questions...and not even sure if the method is correct!
    could someone please elaborate the qn to me!
     
  2. jcsd
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