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How much heat will flow Thermodynamics

  1. Jan 27, 2014 #1
    1. The problem statement, all variables and given/known data

    How much heat will flow in 30 minutes through a 2m X 2m section of concrete (k= 8.36 x 10^-1 J/s m *C) 20 cm thick if the inside temperature if 21*C and the outside temperature is -10*C?

    2. Relevant equations

    Not sure but Q/t= {(kA/L} Tkelvin or Q/t= εσAT^4kelvin

    3. The attempt at a solution

    I did not attempt the solution because i have no idea what formula to use or how to approach a problem like this
  2. jcsd
  3. Jan 27, 2014 #2
    Your first equation is the one to use, but you should have a ΔT, rather than a Tkelvin. This is a heat conduction problem.
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