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Students to classrom heat transfer

  1. Nov 17, 2009 #1
    A student produces heat with a rate of 100W. How much heat is transferred from 90 students to a classroom in 50 minutes?

    Attempt at solution:
    100W (100 J/s) * 90 students * 3000 seconds = 2,7 * 10^7 J. Does this make sense?

    The classroom is 3200 cubic meters and the air in it has a thermal capacity of 1020 J/kgK and a density of 1.20 kg/m3. If no heat escapes from the room and the ventilation is broken, how much does the air temperature increase during the 50 minutes?

    Attempt at solution:
    None. Some help, please?
  2. jcsd
  3. Nov 17, 2009 #2


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    The number of Joules transferred is correct. Do you know of an expression that relates the change in temperature to the heat input?
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