Question: A concrete wall (20 mathrm{~cm}) thick is initially at a temperature of (20^{circ} mathrm{C}), and is exposed to steam at pressure (1 mathrm{~atm}) on both
A concrete wall \(20 \mathrm{~cm}\) thick is initially at a temperature of \(20^{\circ} \mathrm{C}\), and is exposed to steam at pressure \(1 \mathrm{~atm}\) on both sides. Find the time for the system to reach a nearly steady state. Find the rates of condensation of steam at various values of time.
The thermal diffusivity constant for concrete is needed. Use a value of \(7.5 \times 10^{-7} \mathrm{~m}^{2} / \mathrm{s}\).
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