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Homework Help: Thermo Questions

  1. Mar 4, 2012 #1
    1. The problem statement, all variables and given/known data
    1.A gas increases in temperature from 40 C to 120 C while increasing in volume from 1 m3 to 1:3 m3. Find the
    nal pressure, if the initial pressure is atmospheric pressure.

    2.Estimate the length of time it takes for a 0.1 m x 0.1 m x 0.1 m block of steel to cool from 20.0 C to 0 C,
    assuming that it loses thermal energy by conduction through all six faces.

    2. Relevant equations
    ΔV = b V0 Δ T
    but this equation does not give me the pressure and I have no idea whether any other equation relates the info I got with pressure
    H =
    = kA(TH - TC/L)
    Is it I don't have enough info or is the equation I am using wrong?
  2. jcsd
  3. Mar 5, 2012 #2
    anyone can help me please I just need to know whether I am using the right equations.

    Thank you
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